Adding upstream version 1.0.0.upstream/1.0.0upstream

Signed-off-by: Daniel Baumann <daniel@debian.org>

55 files changed, 6853 insertions, 0 deletions

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..c573c55
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,46 @@
+name: Tests
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: set up python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.10'
+
+    - name: install system dependencies
+      run: |
+        sudo apt update
+        sudo apt install python3-lxml python3-dateutil
+
+    - name: install Python dependencies
+      run: |
+        pip install bandit flake8 coverage liccheck
+
+    - name: install feedgen
+      run: |
+        python setup.py install
+
+    - name: run linter
+      run: make test
+
+    - name: run license check
+      run: liccheck -s .licenses.ini
+
+    - name: run tests
+      run: |
+        python -m feedgen
+        python -m feedgen atom
+        python -m feedgen rss
+
+
+    - name: run coverage
+      run: coverage report --fail-under=93
+
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..af64cfd
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,17 @@
+.idea/
+venv
+*.pyc
+*.pyo
+*.swp
+
+feedgen/tests/tmp_Atomfeed.xml
+
+feedgen/tests/tmp_Rssfeed.xml
+
+tmp_Atomfeed.xml
+
+tmp_Rssfeed.xml
+
+# testing artifacts
+.coverage
+*.egg-info/
diff --git a/.licenses.ini b/.licenses.ini
new file mode 100644
index 0000000..cac5032
--- /dev/null
+++ b/.licenses.ini
@@ -0,0 +1,9 @@
+# Authorized licenses in lower case
+
+# There is no project rule against adding new licenses as long as they are
+# compatible with the project's license.
+
+[Licenses]
+authorized_licenses:
+    BSD
+    MIT
diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..a7c625e
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1,3 @@
+include license.bsd license.lgpl readme.rst
+recursive-include docs *.html *.css *.png *.gif *.js
+recursive-include tests *.py
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..a4c34de
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,54 @@
+sdist: doc
+	python setup.py sdist
+
+bdist_wheel: doc
+	python setup.py bdist_wheel
+
+clean: doc-clean
+	@echo Removing binary files...
+	@rm -f `find feedgen -name '*.pyc'`
+	@rm -f `find feedgen -name '*.pyo'`
+	@rm -rf feedgen.egg-info/ build/
+	@echo Removing source distribution files...
+	@rm -rf dist/
+	@rm -f MANIFEST
+	@rm -f tmp_Atomfeed.xml tmp_Rssfeed.xml
+
+doc: doc-clean doc-html doc-man
+
+doc-clean:
+	@echo Removing docs...
+	@make -C doc clean
+	@rm -rf docs
+
+doc-html:
+	@echo 'Generating HTML'
+	@make -C doc html
+	@mkdir -p docs/html
+	@echo 'Copying html to into docs dir'
+	@cp doc/_build/html/*.html docs/html/
+	@cp doc/_build/html/*.js docs/html/
+	@cp -r doc/_build/html/_static/ docs/html/
+	@cp -r doc/_build/html/ext/ docs/html/
+
+doc-man:
+	@echo 'Generating manpage'
+	@make -C doc man
+	@mkdir -p docs/man
+	@echo 'Copying manpage to into docs dir'
+	@cp doc/_build/man/*.1 docs/man/
+
+doc-latexpdf:
+	@echo 'Generating pdf'
+	@make -C doc latexpdf
+	@mkdir -p docs/pdf
+	@echo 'Copying pdf to into docs dir'
+	@cp doc/_build/latex/*.pdf docs/pdf/
+
+publish:
+	twine upload dist/*
+
+test:
+	coverage run --source=feedgen -m unittest discover -s tests
+	flake8 $$(find setup.py tests feedgen -name '*.py')
+	bandit -r feedgen
diff --git a/SECURITY.rst b/SECURITY.rst
new file mode 100644
index 0000000..7af7bb8
--- /dev/null
+++ b/SECURITY.rst
@@ -0,0 +1,17 @@
+Security Policy
+===============
+
+Supported Versions
+------------------
+
+Only the latest version of this library is supported.
+We are doing our best to make updates as easy as possible
+so that keeping up-to-date is usually pretty easy.
+
+
+Reporting a Vulnerability
+-------------------------
+
+If you find a security vulnerability,
+please report it by sending a mail to security@lkiesow.de.
+We will discuss the problem internally and, if necessary, release a patched version as soon as possible.
diff --git a/doc/Makefile b/doc/Makefile
new file mode 100644
index 0000000..4c8c168
--- /dev/null
+++ b/doc/Makefile
@@ -0,0 +1,155 @@
+# Makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS    =
+SPHINXBUILD   = sphinx-build
+#SPHINXBUILD   = python /home/lars/master-thesis/code/modules/core/venv/bin/sphinx-build
+PAPER         =
+BUILDDIR      = _build
+
+# Internal variables.
+PAPEROPT_a4     = -D latex_paper_size=a4
+PAPEROPT_letter = -D latex_paper_size=letter
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+# the i18n builder cannot share the environment and doctrees with the others
+I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+
+.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext
+
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  html       to make standalone HTML files"
+	@echo "  dirhtml    to make HTML files named index.html in directories"
+	@echo "  singlehtml to make a single large HTML file"
+	@echo "  pickle     to make pickle files"
+	@echo "  json       to make JSON files"
+	@echo "  htmlhelp   to make HTML files and a HTML help project"
+	@echo "  qthelp     to make HTML files and a qthelp project"
+	@echo "  devhelp    to make HTML files and a Devhelp project"
+	@echo "  epub       to make an epub"
+	@echo "  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter"
+	@echo "  latexpdf   to make LaTeX files and run them through pdflatex"
+	@echo "  text       to make text files"
+	@echo "  man        to make manual pages"
+	@echo "  texinfo    to make Texinfo files"
+	@echo "  info       to make Texinfo files and run them through makeinfo"
+	@echo "  gettext    to make PO message catalogs"
+	@echo "  changes    to make an overview of all changed/added/deprecated items"
+	@echo "  linkcheck  to check all external links for integrity"
+	@echo "  doctest    to run all doctests embedded in the documentation (if enabled)"
+
+clean:
+	@echo 'Cleaning build directory'
+	@rm -rf $(BUILDDIR)/*
+
+html:
+	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
+
+dirhtml:
+	$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
+
+singlehtml:
+	$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
+	@echo
+	@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."
+
+pickle:
+	$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
+	@echo
+	@echo "Build finished; now you can process the pickle files."
+
+json:
+	$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
+	@echo
+	@echo "Build finished; now you can process the JSON files."
+
+htmlhelp:
+	$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
+	@echo
+	@echo "Build finished; now you can run HTML Help Workshop with the" \
+	      ".hhp project file in $(BUILDDIR)/htmlhelp."
+
+qthelp:
+	$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
+	@echo
+	@echo "Build finished; now you can run "qcollectiongenerator" with the" \
+	      ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
+	@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/Lernfunk3.qhcp"
+	@echo "To view the help file:"
+	@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/Lernfunk3.qhc"
+
+devhelp:
+	$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
+	@echo
+	@echo "Build finished."
+	@echo "To view the help file:"
+	@echo "# mkdir -p $$HOME/.local/share/devhelp/Lernfunk3"
+	@echo "# ln -s $(BUILDDIR)/devhelp $$HOME/.local/share/devhelp/Lernfunk3"
+	@echo "# devhelp"
+
+epub:
+	$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
+	@echo
+	@echo "Build finished. The epub file is in $(BUILDDIR)/epub."
+
+latex:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo
+	@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
+	@echo "Run \`make' in that directory to run these through (pdf)latex" \
+	      "(use \`make latexpdf' here to do that automatically)."
+
+latexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through pdflatex..."
+	$(MAKE) -C $(BUILDDIR)/latex all-pdf
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+text:
+	$(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILDDIR)/text
+	@echo
+	@echo "Build finished. The text files are in $(BUILDDIR)/text."
+
+man:
+	$(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILDDIR)/man
+	@echo
+	@echo "Build finished. The manual pages are in $(BUILDDIR)/man."
+
+texinfo:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo
+	@echo "Build finished. The Texinfo files are in $(BUILDDIR)/texinfo."
+	@echo "Run \`make' in that directory to run these through makeinfo" \
+	      "(use \`make info' here to do that automatically)."
+
+info:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo "Running Texinfo files through makeinfo..."
+	make -C $(BUILDDIR)/texinfo info
+	@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
+
+gettext:
+	$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
+	@echo
+	@echo "Build finished. The message catalogs are in $(BUILDDIR)/locale."
+
+changes:
+	$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
+	@echo
+	@echo "The overview file is in $(BUILDDIR)/changes."
+
+linkcheck:
+	$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck
+	@echo
+	@echo "Link check complete; look for any errors in the above output " \
+	      "or in $(BUILDDIR)/linkcheck/output.txt."
+
+doctest:
+	$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
+	@echo "Testing of doctests in the sources finished, look at the " \
+	      "results in $(BUILDDIR)/doctest/output.txt."
diff --git a/doc/_static/lernfunk.css b/doc/_static/lernfunk.css
new file mode 100644
index 0000000..592129e
--- /dev/null
+++ b/doc/_static/lernfunk.css
@@ -0,0 +1,91 @@
+@import url("haiku.css");
+
+dl.function > dt, dl.method > dt,dl.attribute > dt,  dl.class > dt, dl.get > dt, dl.post > dt, dl.put > dt, dl.delete > dt, dl.data > dt, div.apititle {
+	padding: 5px;
+	padding-left: 15px;
+	border-radius: 3px;
+	border-top: 1px solid gray;
+	background-color: silver;
+}
+
+dl.class {
+	border-left: 5px solid silver;
+	padding-bottom: 10px;
+	margin-bottom: 30px;
+}
+
+table.docutils td, table.docutils th, table.docutils tr {
+	border: none;
+}
+
+table.docutils thead tr {
+	border-bottom: 1px solid gray;
+}
+
+table.docutils {
+	border-top: 2px solid gray;
+	border-bottom: 2px solid gray;
+}
+
+div.apitoc {
+	border-bottom: 2px solid silver;
+	border-left: 10px solid silver;
+}
+
+div.apitoc a {
+	display: block;
+	padding: 0px;
+	padding-left: 10px;
+	color: black;
+}
+
+div.apitoc a:hover {
+	background-color: #eee;
+}
+
+div.apitoc a.second {
+	padding-left: 25px;
+}
+
+div.apitoc a.partOfClass {
+	padding-left: 25px;
+	border-left: 3px solid silver;
+	margin-left: 25px;
+}
+
+div.apitoc span.apilnclassname, div.apitoc big, div.apitoc em {
+	font-weight: lighter;
+}
+
+div.apitoc big, div.apitoc em {
+	color: #666;
+}
+
+div.apitoc span.apilnname {
+	font-weight: bold;
+}
+
+
+a.headerlink {
+	color: gray;
+}
+
+/*
+li.toctree-l3 {
+	display: inline-block;
+	min-width: 200px;
+	padding: 0px;
+	margin: 0px;
+}
+
+li.toctree-l3 a {
+	display: block;
+	margin: 1px 10px;
+	padding: 3px 10px;
+	border-radius: 3px;
+}
+
+li.toctree-l3 a:hover {
+	background-color: #eee;
+}
+*/
diff --git a/doc/_static/theme_extras.js b/doc/_static/theme_extras.js
new file mode 100644
index 0000000..73b00c3
--- /dev/null
+++ b/doc/_static/theme_extras.js
@@ -0,0 +1,28 @@
+$(document).ready(function() {
+	$('.headerlink').each(function( index ) {
+		var type = $(this).parent().get(0).nodeName
+		if (type == 'H1') {
+			var name = $(this).parent().get(0).childNodes[0].data;
+			var ln   = $(this).attr('href');
+			$('div.apitoc').append('<a href="'+ln+'">'+name+'</a>');
+		} else if (type == 'H2') {
+			var name = $(this).parent().get(0).childNodes[0].data;
+			var ln   = $(this).attr('href');
+			$('div.apitoc').append('<a class="h2" href="'+ln+'">'+name+'</a>');
+		} else if (type == 'DT') {
+			//var name = $(this).parent().text().replace('¶', '');
+			var name = $(this).parent().html().replace(/<a .*<\/a>/g, '')
+				.replace(/<tt class="desc/g, '<span class="apiln')
+				.replace(/<\/tt>/g, '</span>');
+			var ln   = $(this).attr('href');
+			var p = $(this).parent().parent();
+			if ( p.hasClass('method') || p.hasClass('attribute') ) {
+				$('div.apitoc').append('<a class="partOfClass" href="'+ln+'">'+name+'</a>');
+			} else {
+				$('div.apitoc').append('<a class="second" href="'+ln+'">'+name+'</a>');
+			}
+		} else {
+			// alert( type );
+		}
+	});
+});
diff --git a/doc/api.entry.rst b/doc/api.entry.rst
new file mode 100644
index 0000000..bbc0c3a
--- /dev/null
+++ b/doc/api.entry.rst
@@ -0,0 +1,8 @@
+.. raw:: html
+
+   <script type=application/javascript src=_static/theme_extras.js></script>
+   <div class="apititle"><b>Contents</b></div>
+   <div class="apitoc"></div>
+
+.. automodule:: feedgen.entry
+   :members:
diff --git a/doc/api.feed.rst b/doc/api.feed.rst
new file mode 100644
index 0000000..228d524
--- /dev/null
+++ b/doc/api.feed.rst
@@ -0,0 +1,8 @@
+.. raw:: html
+
+   <script type=application/javascript src=_static/theme_extras.js></script>
+   <div class="apititle"><b>Contents</b></div>
+   <div class="apitoc"></div>
+
+.. automodule:: feedgen.feed
+   :members:
diff --git a/doc/api.rst b/doc/api.rst
new file mode 100644
index 0000000..9991a6d
--- /dev/null
+++ b/doc/api.rst
@@ -0,0 +1,20 @@
+=================
+API Documentation
+=================
+
+.. automodule:: feedgen
+   :members:
+
+Contents:
+
+.. toctree::
+   :maxdepth: 2
+
+   api.feed
+   api.entry
+   api.util
+   ext/api.ext.base
+   ext/api.ext.dc
+   ext/api.ext.podcast
+   ext/api.ext.podcast_entry
+   ext/api.ext.torrent
diff --git a/doc/api.util.rst b/doc/api.util.rst
new file mode 100644
index 0000000..8042022
--- /dev/null
+++ b/doc/api.util.rst
@@ -0,0 +1,8 @@
+.. raw:: html
+
+   <script type=application/javascript src=_static/theme_extras.js></script>
+   <div class="apititle"><b>Contents</b></div>
+   <div class="apitoc"></div>
+
+.. automodule:: feedgen.util
+   :members:
diff --git a/doc/conf.py b/doc/conf.py
new file mode 100644
index 0000000..4df01a6
--- /dev/null
+++ b/doc/conf.py
@@ -0,0 +1,269 @@
+# -*- coding: utf-8 -*-
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+import sys
+import os
+import codecs
+import re
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+sys.path.insert(0, os.path.abspath('../'))
+sys.path.insert(0, os.path.abspath('.'))
+
+import feedgen.version
+
+# -- General configuration ----------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
+extensions = [
+        'sphinx.ext.intersphinx',
+        'sphinx.ext.coverage',
+        'sphinx.ext.autodoc'
+    ]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# The suffix of source filenames.
+source_suffix = '.rst'
+
+# The encoding of source files.
+source_encoding = 'utf-8-sig'
+
+# The master toctree document.
+master_doc = 'index'
+
+# General information about the project.
+project = u'python-feedgen'
+copyright = u'2013-2016, Lars Kiesow'
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+# The short X.Y version.
+version = feedgen.version.version_minor_str
+# The full version, including alpha/beta/rc tags.
+release = feedgen.version.version_full_str
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#language = None
+
+# There are two options for replacing |today|: either, you set today to some
+# non-false value, then it is used:
+#today = ''
+# Else, today_fmt is used as the format for a strftime call.
+#today_fmt = '%B %d, %Y'
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+exclude_patterns = ['_build']
+
+# The reST default role (used for this markup: `text`) to use for all
+# documents.
+#default_role = None
+
+# If true, '()' will be appended to :func: etc. cross-reference text.
+#add_function_parentheses = True
+
+# If true, the current module name will be prepended to all description
+# unit titles (such as .. function::).
+#add_module_names = True
+
+# If true, sectionauthor and moduleauthor directives will be shown in the
+# output. They are ignored by default.
+#show_authors = False
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'sphinx'
+
+# A list of ignored prefixes for module index sorting.
+#modindex_common_prefix = []
+
+
+# -- Options for HTML output --------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+html_theme = 'default'
+html_theme = 'haiku'
+
+html_style = 'lernfunk.css'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#html_theme_options = {}
+
+# Add any paths that contain custom themes here, relative to this directory.
+#html_theme_path = []
+
+# The name for this set of Sphinx documents.  If None, it defaults to
+# "<project> v<release> documentation".
+#html_title = None
+
+# A shorter title for the navigation bar.  Default is the same as html_title.
+#html_short_title = None
+
+# The name of an image file (relative to this directory) to place at the top
+# of the sidebar.
+#html_logo = '_static/logo.png'
+
+# The name of an image file (within the static path) to use as favicon of the
+# docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
+# pixels large.
+#html_favicon = None
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
+# using the given strftime format.
+#html_last_updated_fmt = '%b %d, %Y'
+
+# If true, SmartyPants will be used to convert quotes and dashes to
+# typographically correct entities.
+#html_use_smartypants = True
+
+# Custom sidebar templates, maps document names to template names.
+#html_sidebars = {}
+
+# Additional templates that should be rendered to pages, maps page names to
+# template names.
+#html_additional_pages = {}
+
+# If false, no module index is generated.
+#html_domain_indices = True
+
+# If false, no index is generated.
+#html_use_index = True
+
+# If true, the index is split into individual pages for each letter.
+#html_split_index = False
+
+# If true, links to the reST sources are added to the pages.
+#html_show_sourcelink = True
+
+# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
+#html_show_sphinx = True
+
+# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
+#html_show_copyright = True
+
+# If true, an OpenSearch description file will be output, and all pages will
+# contain a <link> tag referring to it.  The value of this option must be the
+# base URL from which the finished HTML is served.
+#html_use_opensearch = ''
+
+# This is the file name suffix for HTML files (e.g. ".xhtml").
+#html_file_suffix = None
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'pyFeedGen'
+
+
+# -- Options for LaTeX output -------------------------------------------------
+
+latex_elements = {
+    # The paper size ('letterpaper' or 'a4paper').
+    #'papersize': 'letterpaper',
+
+    # The font size ('10pt', '11pt' or '12pt').
+    #'pointsize': '10pt',
+
+    # Additional stuff for the LaTeX preamble.
+    #'preamble': '',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples (source start
+# file, target name, title, author, documentclass [howto/manual]).
+latex_documents = [
+    ('index', 'pyFeedGen.tex', u'pyFeedGen Documentation', u'Lars Kiesow',
+     'manual'),
+]
+
+# The name of an image file (relative to this directory) to place at the top of
+# the title page.
+#latex_logo = None
+
+# For "manual" documents, if this is true, then toplevel headings are parts,
+# not chapters.
+#latex_use_parts = False
+
+# If true, show page references after internal links.
+#latex_show_pagerefs = False
+
+# If true, show URL addresses after external links.
+#latex_show_urls = False
+
+# Documents to append as an appendix to all manuals.
+#latex_appendices = []
+
+# If false, no module index is generated.
+#latex_domain_indices = True
+
+
+# -- Options for manual page output -------------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('index', 'pyFeedGen.tex', u'pyFeedGen Documentation',
+        [u'Lars Kiesow'], 1)
+]
+
+# If true, show URL addresses after external links.
+#man_show_urls = False
+
+
+# -- Options for Texinfo output -----------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+    ('index', 'pyFeedGen.tex', u'pyFeedGen Documentation',
+        u'Lars Kiesow', 'Lernfunk3', 'One line description of project.',
+        'Miscellaneous'),
+]
+
+# Documents to append as an appendix to all manuals.
+#texinfo_appendices = []
+
+# If false, no module index is generated.
+#texinfo_domain_indices = True
+
+# How to display URL addresses: 'footnote', 'no', or 'inline'.
+#texinfo_show_urls = 'footnote'
+
+
+# Example configuration for intersphinx: refer to the Python standard library.
+intersphinx_mapping = {'http://docs.python.org/': None}
+
+
+# Include the GitHub readme file in index.rst
+r = re.compile(r'\[`*([^\]`]+)`*\]\(([^\)]+)\)')
+r2 = re.compile(r'.. include-github-readme')
+
+
+def substitute_link(app, docname, text):
+    if docname == 'index':
+        readme_text = ''
+        with codecs.open(os.path.abspath('../readme.rst'), 'r', 'utf-8') as f:
+            readme_text = r.sub(r'`\1 <\2>`_', f.read())
+        text[0] = r2.sub(readme_text, text[0])
+
+
+def setup(app):
+    app.connect('source-read', substitute_link)
diff --git a/doc/ext/api.ext.base.rst b/doc/ext/api.ext.base.rst
new file mode 100644
index 0000000..047f752
--- /dev/null
+++ b/doc/ext/api.ext.base.rst
@@ -0,0 +1,8 @@
+.. raw:: html
+
+   <script type=application/javascript src=_static/theme_extras.js></script>
+   <div class="apititle"><b>Contents</b></div>
+   <div class="apitoc"></div>
+
+.. automodule:: feedgen.ext.base
+   :members:
diff --git a/doc/ext/api.ext.dc.rst b/doc/ext/api.ext.dc.rst
new file mode 100644
index 0000000..1700156
--- /dev/null
+++ b/doc/ext/api.ext.dc.rst
@@ -0,0 +1,8 @@
+.. raw:: html
+
+   <script type=application/javascript src=_static/theme_extras.js></script>
+   <div class="apititle"><b>Contents</b></div>
+   <div class="apitoc"></div>
+
+.. automodule:: feedgen.ext.dc
+   :members:
diff --git a/doc/ext/api.ext.podcast.rst b/doc/ext/api.ext.podcast.rst
new file mode 100644
index 0000000..8aaf6d6
--- /dev/null
+++ b/doc/ext/api.ext.podcast.rst
@@ -0,0 +1,8 @@
+.. raw:: html
+
+   <script type=application/javascript src=_static/theme_extras.js></script>
+   <div class="apititle"><b>Contents</b></div>
+   <div class="apitoc"></div>
+
+.. automodule:: feedgen.ext.podcast
+   :members:
diff --git a/doc/ext/api.ext.podcast_entry.rst b/doc/ext/api.ext.podcast_entry.rst
new file mode 100644
index 0000000..e713111
--- /dev/null
+++ b/doc/ext/api.ext.podcast_entry.rst
@@ -0,0 +1,8 @@
+.. raw:: html
+
+   <script type=application/javascript src=_static/theme_extras.js></script>
+   <div class="apititle"><b>Contents</b></div>
+   <div class="apitoc"></div>
+
+.. automodule:: feedgen.ext.podcast_entry
+   :members:
diff --git a/doc/ext/api.ext.torrent.rst b/doc/ext/api.ext.torrent.rst
new file mode 100644
index 0000000..ccfbc7b
--- /dev/null
+++ b/doc/ext/api.ext.torrent.rst
@@ -0,0 +1,8 @@
+.. raw:: html
+
+   <script type=application/javascript src=_static/theme_extras.js></script>
+   <div class="apititle"><b>Contents</b></div>
+   <div class="apitoc"></div>
+
+.. automodule:: feedgen.ext.torrent
+   :members:
diff --git a/doc/index.rst b/doc/index.rst
new file mode 100644
index 0000000..22fc46b
--- /dev/null
+++ b/doc/index.rst
@@ -0,0 +1,25 @@
+.. contents:: Table of Contents
+
+.. include-github-readme
+
+.. raw:: html
+
+   <hr />
+
+====================
+Module documentation
+====================
+
+.. toctree::
+   :maxdepth: 2
+
+   api
+
+==================
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
+
diff --git a/feedgen/__init__.py b/feedgen/__init__.py
new file mode 100644
index 0000000..b28c0e9
--- /dev/null
+++ b/feedgen/__init__.py
@@ -0,0 +1,135 @@
+# -*- coding: utf-8 -*-
+"""
+    =======
+    feedgen
+    =======
+
+    This module can be used to generate web feeds in both ATOM and RSS format.
+    It has support for extensions. Included is for example an extension to
+    produce Podcasts.
+
+    :copyright: 2013 by Lars Kiesow
+    :license: FreeBSD and LGPL, see license.* for more details.
+
+
+    -------------
+    Create a Feed
+    -------------
+
+    To create a feed simply instantiate the FeedGenerator class and insert some
+    data::
+
+        >>> from feedgen.feed import FeedGenerator
+        >>> fg = FeedGenerator()
+        >>> fg.id('http://lernfunk.de/media/654321')
+        >>> fg.title('Some Testfeed')
+        >>> fg.author( {'name':'John Doe','email':'john@example.de'} )
+        >>> fg.link( href='http://example.com', rel='alternate' )
+        >>> fg.logo('http://ex.com/logo.jpg')
+        >>> fg.subtitle('This is a cool feed!')
+        >>> fg.link( href='http://larskiesow.de/test.atom', rel='self' )
+        >>> fg.language('en')
+
+    Note that for the methods which set fields that can occur more than once in
+    a feed you can use all of the following ways to provide data:
+
+    - Provide the data for that element as keyword arguments
+    - Provide the data for that element as dictionary
+    - Provide a list of dictionaries with the data for several elements
+
+    Example::
+
+        >>> fg.contributor(name='John Doe', email='jdoe@example.com' )
+        >>> fg.contributor({'name':'John Doe', 'email':'jdoe@example.com'})
+        >>> fg.contributor([{'name':'John', 'email':'jdoe@example.com'}, …])
+
+    -----------------
+    Generate the Feed
+    -----------------
+
+    After that you can generate both RSS or ATOM by calling the respective
+    method::
+
+        >>> atomfeed = fg.atom_str(pretty=True) # Get the ATOM feed as string
+        >>> rssfeed  = fg.rss_str(pretty=True) # Get the RSS feed as string
+        >>> fg.atom_file('atom.xml') # Write the ATOM feed to a file
+        >>> fg.rss_file('rss.xml') # Write the RSS feed to a file
+
+
+    ----------------
+    Add Feed Entries
+    ----------------
+
+    To add entries (items) to a feed you need to create new FeedEntry objects
+    and append them to the list of entries in the FeedGenerator. The most
+    convenient way to do this, is to call the method add_entry(...) like this::
+
+        >>> fe = fg.add_entry()
+        >>> fe.id('http://lernfunk.de/media/654321/1')
+        >>> fe.title('The First Episode')
+
+    The FeedGenerator's method add_entry(...) will automatically create a new
+    FeedEntry object, append it to the feeds internal list of entries and
+    return it, so that additional data can be added.
+
+    ----------
+    Extensions
+    ----------
+
+    The FeedGenerator supports extension to include additional data into the
+    XML structure of the feeds. Extensions can be loaded like this::
+
+        >>> fg.load_extension('someext', atom=True, rss=True)
+
+    This will try to load the extension “someext” from the file
+    `ext/someext.py`. It is required that `someext.py` contains a class named
+    “SomextExtension” which is required to have at least the two methods
+    `extend_rss(...)` and `extend_atom(...)`. Although not required, it is
+    strongly suggested to use BaseExtension from `ext/base.py` as superclass.
+
+    `load_extension('someext', ...)` will also try to load a class named
+    “SomextEntryExtension” for every entry of the feed. This class can be
+    located either in the same file as SomextExtension or in
+    `ext/someext_entry.py` which is suggested especially for large extensions.
+
+    The parameters `atom` and `rss` tell the FeedGenerator if the extensions
+    should only be used for either ATOM or RSS feeds. The default value for
+    both parameters is true which means that the extension would be used for
+    both kinds of feeds.
+
+    **Example: Producing a Podcast**
+
+    One extension already provided is the podcast extension. A podcast is an
+    RSS feed with some additional elements for ITunes.
+
+    To produce a podcast simply load the `podcast` extension::
+
+        >>> from feedgen.feed import FeedGenerator
+        >>> fg = FeedGenerator()
+        >>> fg.load_extension('podcast')
+        ...
+        >>> fg.podcast.itunes_category('Technology', 'Podcasting')
+        ...
+        >>> fg.rss_str(pretty=True)
+        >>> fg.rss_file('podcast.xml')
+
+    Of cause the extension has to be loaded for the FeedEntry objects as well
+    but this is done automatically by the FeedGenerator for every feed entry if
+    the extension is loaded for the whole feed. You can, however, load an
+    extension for a specific FeedEntry by calling `load_extension(...)` on that
+    entry. But this is a rather uncommon use.
+
+    Of cause you can still produce a normal ATOM or RSS feed, even if you have
+    loaded some plugins by temporary disabling them during the feed generation.
+    This can be done by calling the generating method with the keyword argument
+    `extensions` set to `False`.
+
+    ---------------------
+    Testing the Generator
+    ---------------------
+
+    You can test the module by simply executing::
+
+        $ python -m feedgen
+
+"""
diff --git a/feedgen/__main__.py b/feedgen/__main__.py
new file mode 100644
index 0000000..d7dd1aa
--- /dev/null
+++ b/feedgen/__main__.py
@@ -0,0 +1,150 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen
+    ~~~~~~~
+
+    :copyright: 2013-2016, Lars Kiesow <lkiesow@uos.de>
+
+    :license: FreeBSD and LGPL, see license.* for more details.
+'''
+
+import sys
+
+from feedgen.feed import FeedGenerator
+
+
+USAGE = '''
+Usage: python -m feedgen [OPTION]
+
+Use one of the following options:
+
+File options:
+  <file>.atom      -- Generate ATOM test feed
+  <file>.rss       -- Generate RSS test teed
+
+Stdout options:
+  atom             -- Generate ATOM test output
+  rss              -- Generate RSS test output
+  podcast          -- Generate Podcast test output
+  dc.atom          -- Generate DC extension test output (atom format)
+  dc.rss           -- Generate DC extension test output (rss format)
+  syndication.atom -- Generate syndication extension test output (atom format)
+  syndication.rss  -- Generate syndication extension test output (rss format)
+  torrent          -- Generate Torrent test output
+
+'''
+
+
+def print_enc(s):
+    '''Print function compatible with both python2 and python3 accepting
+    strings and byte arrays.
+    '''
+    if sys.version_info[0] >= 3:
+        print(s.decode('utf-8') if isinstance(s, bytes) else s)
+    else:
+        print(s)
+
+
+def main():
+    if len(sys.argv) != 2 or not (
+            sys.argv[1].endswith('rss') or
+            sys.argv[1].endswith('atom') or
+            sys.argv[1] == 'torrent' or
+            sys.argv[1] == 'podcast'):
+        print(USAGE)
+        exit()
+
+    arg = sys.argv[1]
+
+    fg = FeedGenerator()
+    fg.id('http://lernfunk.de/_MEDIAID_123')
+    fg.title('Testfeed')
+    fg.author({'name': 'Lars Kiesow', 'email': 'lkiesow@uos.de'})
+    fg.link(href='http://example.com', rel='alternate')
+    fg.category(term='test')
+    fg.contributor(name='Lars Kiesow', email='lkiesow@uos.de')
+    fg.contributor(name='John Doe', email='jdoe@example.com')
+    fg.icon('http://ex.com/icon.jpg')
+    fg.logo('http://ex.com/logo.jpg')
+    fg.rights('cc-by')
+    fg.subtitle('This is a cool feed!')
+    fg.link(href='http://larskiesow.de/test.atom', rel='self')
+    fg.language('de')
+    fe = fg.add_entry()
+    fe.id('http://lernfunk.de/_MEDIAID_123#1')
+    fe.title('First Element')
+    fe.content('''Lorem ipsum dolor sit amet, consectetur adipiscing elit.
+            Tamen aberramus a proposito, et, ne longius, prorsus, inquam, Piso,
+            si ista mala sunt, placet. Aut etiam, ut vestitum, sic sententiam
+            habeas aliam domesticam, aliam forensem, ut in fronte ostentatio
+            sit, intus veritas occultetur? Cum id fugiunt, re eadem defendunt,
+            quae Peripatetici, verba.''')
+    fe.summary(u'Lorem ipsum dolor sit amet, consectetur adipiscing elit…')
+    fe.link(href='http://example.com', rel='alternate')
+    fe.author(name='Lars Kiesow', email='lkiesow@uos.de')
+
+    if arg == 'atom':
+        print_enc(fg.atom_str(pretty=True))
+    elif arg == 'rss':
+        print_enc(fg.rss_str(pretty=True))
+    elif arg == 'podcast':
+        # Load the podcast extension. It will automatically be loaded for all
+        # entries in the feed, too. Thus also for our “fe”.
+        fg.load_extension('podcast')
+        fg.podcast.itunes_author('Lars Kiesow')
+        fg.podcast.itunes_category('Technology', 'Podcasting')
+        fg.podcast.itunes_explicit('no')
+        fg.podcast.itunes_complete('no')
+        fg.podcast.itunes_new_feed_url('http://example.com/new-feed.rss')
+        fg.podcast.itunes_owner('John Doe', 'john@example.com')
+        fg.podcast.itunes_summary('Lorem ipsum dolor sit amet, consectetur ' +
+                                  'adipiscing elit. Verba tu fingas et ea ' +
+                                  'dicas, quae non sentias?')
+        fg.podcast.itunes_type('episodic')
+        fe.podcast.itunes_author('Lars Kiesow')
+        fe.podcast.itunes_season(1)
+        fe.podcast.itunes_episode(1)
+        fe.podcast.itunes_title('First podcast episode')
+        fe.podcast.itunes_episode_type('full')
+        print_enc(fg.rss_str(pretty=True))
+
+    elif arg == 'torrent':
+        fg.load_extension('torrent')
+        fe.link(href='http://example.com/torrent/debian-8-netint.iso.torrent',
+                rel='alternate',
+                type='application/x-bittorrent, length=1000')
+        fe.torrent.filename('debian-8.4.0-i386-netint.iso.torrent')
+        fe.torrent.infohash('7661229811ef32014879ceedcdf4a48f256c88ba')
+        fe.torrent.contentlength('331350016')
+        fe.torrent.seeds('789')
+        fe.torrent.peers('456')
+        fe.torrent.verified('123')
+        print_enc(fg.rss_str(pretty=True))
+
+    elif arg.startswith('dc.'):
+        fg.load_extension('dc')
+        fg.dc.dc_contributor('Lars Kiesow')
+        if arg.endswith('.atom'):
+            print_enc(fg.atom_str(pretty=True))
+        else:
+            print_enc(fg.rss_str(pretty=True))
+
+    elif arg.startswith('syndication'):
+        fg.load_extension('syndication')
+        fg.syndication.update_period('daily')
+        fg.syndication.update_frequency(2)
+        fg.syndication.update_base('2000-01-01T12:00+00:00')
+        if arg.endswith('.rss'):
+            print_enc(fg.rss_str(pretty=True))
+        else:
+            print_enc(fg.atom_str(pretty=True))
+
+    elif arg.endswith('atom'):
+        fg.atom_file(arg)
+
+    elif arg.endswith('rss'):
+        fg.rss_file(arg)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/feedgen/compat.py b/feedgen/compat.py
new file mode 100644
index 0000000..e9044b0
--- /dev/null
+++ b/feedgen/compat.py
@@ -0,0 +1,8 @@
+# -*- coding: utf-8 -*-
+
+import sys
+
+if sys.version_info[0] >= 3:
+    string_types = str
+else:
+    string_types = basestring  # noqa: F821
diff --git a/feedgen/entry.py b/feedgen/entry.py
new file mode 100644
index 0000000..5dd21c2
--- /dev/null
+++ b/feedgen/entry.py
@@ -0,0 +1,738 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen.entry
+    ~~~~~~~~~~~~~
+
+    :copyright: 2013-2020, Lars Kiesow <lkiesow@uos.de>
+
+    :license: FreeBSD and LGPL, see license.* for more details.
+'''
+
+from datetime import datetime
+
+import dateutil.parser
+import dateutil.tz
+import warnings
+
+from lxml.etree import CDATA  # nosec - adding CDATA entry is safe
+
+from feedgen.compat import string_types
+from feedgen.util import ensure_format, formatRFC2822, xml_fromstring, xml_elem
+
+
+def _add_text_elm(entry, data, name):
+    """Add a text subelement to an entry"""
+    if not data:
+        return
+
+    elm = xml_elem(name, entry)
+    type_ = data.get('type')
+    if data.get('src'):
+        if name != 'content':
+            raise ValueError("Only the 'content' element of an entry can "
+                             "contain a 'src' attribute")
+        elm.attrib['src'] = data['src']
+    elif data.get(name):
+        # Surround xhtml with a div tag, parse it and embed it
+        if type_ == 'xhtml':
+            xhtml = '<div xmlns="http://www.w3.org/1999/xhtml">' \
+                    + data.get(name) + '</div>'
+            elm.append(xml_fromstring(xhtml))
+        elif type_ == 'CDATA':
+            elm.text = CDATA(data.get(name))
+        # Parse XML and embed it
+        elif type_ and (type_.endswith('/xml') or type_.endswith('+xml')):
+            elm.append(xml_fromstring(data[name]))
+        # Embed the text in escaped form
+        elif not type_ or type_.startswith('text') or type_ == 'html':
+            elm.text = data.get(name)
+        # Everything else should be included base64 encoded
+        else:
+            raise NotImplementedError(
+                'base64 encoded {} is not supported at the moment. '
+                'Pull requests adding support are welcome.'.format(name)
+            )
+    # Add type description of the content
+    if type_:
+        elm.attrib['type'] = type_
+
+
+class FeedEntry(object):
+    '''FeedEntry call representing an ATOM feeds entry node or an RSS feeds
+    item node.
+    '''
+
+    def __init__(self):
+        # ATOM
+        # required
+        self.__atom_id = None
+        self.__atom_title = None
+        self.__atom_updated = datetime.now(dateutil.tz.tzutc())
+
+        # recommended
+        self.__atom_author = None
+        self.__atom_content = None
+        self.__atom_link = None
+        self.__atom_summary = None
+
+        # optional
+        self.__atom_category = None
+        self.__atom_contributor = None
+        self.__atom_published = None
+        self.__atom_source = None
+        self.__atom_rights = None
+
+        # RSS
+        self.__rss_author = None
+        self.__rss_category = None
+        self.__rss_comments = None
+        self.__rss_description = None
+        self.__rss_content = None
+        self.__rss_enclosure = None
+        self.__rss_guid = {}
+        self.__rss_link = None
+        self.__rss_pubDate = None
+        self.__rss_source = None
+        self.__rss_title = None
+
+        # Extension list:
+        self.__extensions = {}
+        self.__extensions_register = {}
+
+    def atom_entry(self, extensions=True):
+        '''Create an ATOM entry and return it.'''
+        entry = xml_elem('entry')
+        if not (self.__atom_id and self.__atom_title and self.__atom_updated):
+            raise ValueError('Required fields not set')
+        id = xml_elem('id', entry)
+        id.text = self.__atom_id
+        title = xml_elem('title', entry)
+        title.text = self.__atom_title
+        updated = xml_elem('updated', entry)
+        updated.text = self.__atom_updated.isoformat()
+
+        # An entry must contain an alternate link if there is no content
+        # element.
+        if not self.__atom_content:
+            links = self.__atom_link or []
+            if not [link for link in links if link.get('rel') == 'alternate']:
+                raise ValueError('Entry must contain an alternate link or '
+                                 'a content element.')
+
+        # Add author elements
+        for a in self.__atom_author or []:
+            # Atom requires a name. Skip elements without.
+            if not a.get('name'):
+                continue
+            author = xml_elem('author', entry)
+            name = xml_elem('name', author)
+            name.text = a.get('name')
+            if a.get('email'):
+                email = xml_elem('email', author)
+                email.text = a.get('email')
+            if a.get('uri'):
+                uri = xml_elem('uri', author)
+                uri.text = a.get('uri')
+
+        _add_text_elm(entry, self.__atom_content, 'content')
+
+        for link in self.__atom_link or []:
+            link = xml_elem('link', entry, href=link['href'])
+            if link.get('rel'):
+                link.attrib['rel'] = link['rel']
+            if link.get('type'):
+                link.attrib['type'] = link['type']
+            if link.get('hreflang'):
+                link.attrib['hreflang'] = link['hreflang']
+            if link.get('title'):
+                link.attrib['title'] = link['title']
+            if link.get('length'):
+                link.attrib['length'] = link['length']
+
+        _add_text_elm(entry, self.__atom_summary, 'summary')
+
+        for c in self.__atom_category or []:
+            cat = xml_elem('category', entry, term=c['term'])
+            if c.get('scheme'):
+                cat.attrib['scheme'] = c['scheme']
+            if c.get('label'):
+                cat.attrib['label'] = c['label']
+
+        # Add author elements
+        for c in self.__atom_contributor or []:
+            # Atom requires a name. Skip elements without.
+            if not c.get('name'):
+                continue
+            contrib = xml_elem('contributor', entry)
+            name = xml_elem('name', contrib)
+            name.text = c.get('name')
+            if c.get('email'):
+                email = xml_elem('email', contrib)
+                email.text = c.get('email')
+            if c.get('uri'):
+                uri = xml_elem('uri', contrib)
+                uri.text = c.get('uri')
+
+        if self.__atom_published:
+            published = xml_elem('published', entry)
+            published.text = self.__atom_published.isoformat()
+
+        if self.__atom_rights:
+            rights = xml_elem('rights', entry)
+            rights.text = self.__atom_rights
+
+        if self.__atom_source:
+            source = xml_elem('source', entry)
+            if self.__atom_source.get('title'):
+                source_title = xml_elem('title', source)
+                source_title.text = self.__atom_source['title']
+            if self.__atom_source.get('link'):
+                xml_elem('link', source, href=self.__atom_source['link'])
+
+        if extensions:
+            for ext in self.__extensions.values() or []:
+                if ext.get('atom'):
+                    ext['inst'].extend_atom(entry)
+
+        return entry
+
+    def rss_entry(self, extensions=True):
+        '''Create a RSS item and return it.'''
+        entry = xml_elem('item')
+        if not (self.__rss_title or
+                self.__rss_description or
+                self.__rss_content):
+            raise ValueError('Required fields not set')
+        if self.__rss_title:
+            title = xml_elem('title', entry)
+            title.text = self.__rss_title
+        if self.__rss_link:
+            link = xml_elem('link', entry)
+            link.text = self.__rss_link
+        if self.__rss_description and self.__rss_content:
+            description = xml_elem('description', entry)
+            description.text = self.__rss_description
+            XMLNS_CONTENT = 'http://purl.org/rss/1.0/modules/content/'
+            content = xml_elem('{%s}encoded' % XMLNS_CONTENT, entry)
+            content.text = CDATA(self.__rss_content['content']) \
+                if self.__rss_content.get('type', '') == 'CDATA' \
+                else self.__rss_content['content']
+        elif self.__rss_description:
+            description = xml_elem('description', entry)
+            description.text = self.__rss_description
+        elif self.__rss_content:
+            description = xml_elem('description', entry)
+            description.text = CDATA(self.__rss_content['content']) \
+                if self.__rss_content.get('type', '') == 'CDATA' \
+                else self.__rss_content['content']
+        for a in self.__rss_author or []:
+            author = xml_elem('author', entry)
+            author.text = a
+        if self.__rss_guid.get('guid'):
+            guid = xml_elem('guid', entry)
+            guid.text = self.__rss_guid['guid']
+            permaLink = str(self.__rss_guid.get('permalink', False)).lower()
+            guid.attrib['isPermaLink'] = permaLink
+        for cat in self.__rss_category or []:
+            category = xml_elem('category', entry)
+            category.text = cat['value']
+            if cat.get('domain'):
+                category.attrib['domain'] = cat['domain']
+        if self.__rss_comments:
+            comments = xml_elem('comments', entry)
+            comments.text = self.__rss_comments
+        if self.__rss_enclosure:
+            enclosure = xml_elem('enclosure', entry)
+            enclosure.attrib['url'] = self.__rss_enclosure['url']
+            enclosure.attrib['length'] = self.__rss_enclosure['length']
+            enclosure.attrib['type'] = self.__rss_enclosure['type']
+        if self.__rss_pubDate:
+            pubDate = xml_elem('pubDate', entry)
+            pubDate.text = formatRFC2822(self.__rss_pubDate)
+        if self.__rss_source:
+            source = xml_elem('source', entry, url=self.__rss_source['url'])
+            source.text = self.__rss_source['title']
+
+        if extensions:
+            for ext in self.__extensions.values() or []:
+                if ext.get('rss'):
+                    ext['inst'].extend_rss(entry)
+
+        return entry
+
+    def title(self, title=None):
+        '''Get or set the title value of the entry. It should contain a human
+        readable title for the entry. Title is mandatory for both ATOM and RSS
+        and should not be blank.
+
+        :param title: The new title of the entry.
+        :returns: The entriess title.
+        '''
+        if title is not None:
+            self.__atom_title = title
+            self.__rss_title = title
+        return self.__atom_title
+
+    def id(self, id=None):
+        '''Get or set the entry id which identifies the entry using a
+        universally unique and permanent URI. Two entries in a feed can have
+        the same value for id if they represent the same entry at different
+        points in time. This method will also set rss:guid with permalink set
+        to False. Id is mandatory for an ATOM entry.
+
+        :param id: New Id of the entry.
+        :returns: Id of the entry.
+        '''
+        if id is not None:
+            self.__atom_id = id
+            self.__rss_guid = {'guid': id, 'permalink': False}
+        return self.__atom_id
+
+    def guid(self, guid=None, permalink=False):
+        '''Get or set the entries guid which is a string that uniquely
+        identifies the item. This will also set atom:id.
+
+        :param guid: Id of the entry.
+        :param permalink: If this is a permanent identifier for this item
+        :returns: Id and permalink setting of the entry.
+        '''
+        if guid is not None:
+            self.__atom_id = guid
+            self.__rss_guid = {'guid': guid, 'permalink': permalink}
+        return self.__rss_guid
+
+    def updated(self, updated=None):
+        '''Set or get the updated value which indicates the last time the entry
+        was modified in a significant way.
+
+        The value can either be a string which will automatically be parsed or
+        a datetime.datetime object. In any case it is necessary that the value
+        include timezone information.
+
+        :param updated: The modification date.
+        :returns: Modification date as datetime.datetime
+        '''
+        if updated is not None:
+            if isinstance(updated, string_types):
+                updated = dateutil.parser.parse(updated)
+            if not isinstance(updated, datetime):
+                raise ValueError('Invalid datetime format')
+            if updated.tzinfo is None:
+                raise ValueError('Datetime object has no timezone info')
+            self.__atom_updated = updated
+            self.__rss_lastBuildDate = updated
+
+        return self.__atom_updated
+
+    def author(self, author=None, replace=False, **kwargs):
+        '''Get or set author data. An author element is a dict containing a
+        name, an email address and a uri. Name is mandatory for ATOM, email is
+        mandatory for RSS.
+
+        This method can be called with:
+        - the fields of an author as keyword arguments
+        - the fields of an author as a dictionary
+        - a list of dictionaries containing the author fields
+
+        An author has the following fields:
+        - *name* conveys a human-readable name for the person.
+        - *uri* contains a home page for the person.
+        - *email* contains an email address for the person.
+
+        :param author:  Dict or list of dicts with author data.
+        :param replace: Add or replace old data.
+
+        Example::
+
+            >>> author({'name':'John Doe', 'email':'jdoe@example.com'})
+            [{'name':'John Doe','email':'jdoe@example.com'}]
+
+            >>> author([{'name': 'Mr. X'}, {'name': 'Max'}])
+            [{'name':'John Doe','email':'jdoe@example.com'},
+                    {'name':'John Doe'}, {'name':'Max'}]
+
+            >>> author(name='John Doe', email='jdoe@example.com', replace=True)
+            [{'name':'John Doe','email':'jdoe@example.com'}]
+
+        '''
+        if author is None and kwargs:
+            author = kwargs
+        if author is not None:
+            if replace or self.__atom_author is None:
+                self.__atom_author = []
+            self.__atom_author += ensure_format(author,
+                                                set(['name', 'email', 'uri']),
+                                                set())
+            self.__rss_author = []
+            for a in self.__atom_author:
+                if a.get('email'):
+                    if a.get('name'):
+                        self.__rss_author.append('%(email)s (%(name)s)' % a)
+                    else:
+                        self.__rss_author.append('%(email)s' % a)
+        return self.__atom_author
+
+    def content(self, content=None, src=None, type=None):
+        '''Get or set the content of the entry which contains or links to the
+        complete content of the entry. Content must be provided for ATOM
+        entries if there is no alternate link, and should be provided if there
+        is no summary. If the content is set (not linked) it will also set
+        rss:description.
+
+        :param content: The content of the feed entry.
+        :param src: Link to the entries content.
+        :param type: If type is CDATA content would not be escaped.
+        :returns: Content element of the entry.
+        '''
+        if src is not None:
+            self.__atom_content = {'src': src}
+        elif content is not None:
+            self.__atom_content = {'content': content}
+            self.__rss_content = {'content': content}
+            if type is not None:
+                self.__atom_content['type'] = type
+                self.__rss_content['type'] = type
+        return self.__atom_content
+
+    def link(self, link=None, replace=False, **kwargs):
+        '''Get or set link data. An link element is a dict with the fields
+        href, rel, type, hreflang, title, and length. Href is mandatory for
+        ATOM.
+
+        This method can be called with:
+        - the fields of a link as keyword arguments
+        - the fields of a link as a dictionary
+        - a list of dictionaries containing the link fields
+
+        A link has the following fields:
+
+        - *href* is the URI of the referenced resource (typically a Web page)
+        - *rel* contains a single link relationship type. It can be a full URI,
+          or one of the following predefined values (default=alternate):
+
+            - *alternate* an alternate representation of the entry or feed, for
+              example a permalink to the html version of the entry, or the
+              front page of the weblog.
+            - *enclosure* a related resource which is potentially large in size
+              and might require special handling, for example an audio or video
+              recording.
+            - *related* an document related to the entry or feed.
+            - *self* the feed itself.
+            - *via* the source of the information provided in the entry.
+
+        - *type* indicates the media type of the resource.
+        - *hreflang* indicates the language of the referenced resource.
+        - *title* human readable information about the link, typically for
+          display purposes.
+        - *length* the length of the resource, in bytes.
+
+        RSS only supports one link with nothing but a URL. So for the RSS link
+        element the last link with rel=alternate is used.
+
+        RSS also supports one enclusure element per entry which is covered by
+        the link element in ATOM feed entries. So for the RSS enclusure element
+        the last link with rel=enclosure is used.
+
+        :param link:    Dict or list of dicts with data.
+        :param replace: Add or replace old data.
+        :returns: List of link data.
+        '''
+        if link is None and kwargs:
+            link = kwargs
+        if link is not None:
+            if replace or self.__atom_link is None:
+                self.__atom_link = []
+            self.__atom_link += ensure_format(
+                link,
+                set(['href', 'rel', 'type', 'hreflang', 'title', 'length']),
+                set(['href']),
+                {'rel': ['alternate', 'enclosure', 'related', 'self', 'via']},
+                {'rel': 'alternate'})
+            # RSS only needs one URL. We use the first link for RSS:
+            for link in self.__atom_link:
+                if link.get('rel') == 'alternate':
+                    self.__rss_link = link['href']
+                elif link.get('rel') == 'enclosure':
+                    self.__rss_enclosure = {'url': link['href']}
+                    self.__rss_enclosure['type'] = link.get('type')
+                    self.__rss_enclosure['length'] = link.get('length') or '0'
+        # return the set with more information (atom)
+        return self.__atom_link
+
+    def summary(self, summary=None, type=None):
+        '''Get or set the summary element of an entry which conveys a short
+        summary, abstract, or excerpt of the entry. Summary is an ATOM only
+        element and should be provided if there either is no content provided
+        for the entry, or that content is not inline (i.e., contains a src
+        attribute), or if the content is encoded in base64.  This method will
+        also set the rss:description field if it wasn't previously set or
+        contains the old value of summary.
+
+        :param summary: Summary of the entries contents.
+        :returns: Summary of the entries contents.
+        '''
+        if summary is not None:
+            # Replace the RSS description with the summary if it was the
+            # summary before. Not if it is the description.
+            if not self.__rss_description or (
+                self.__atom_summary and
+                self.__rss_description == self.__atom_summary.get("summary")
+            ):
+                self.__rss_description = summary
+
+            self.__atom_summary = {'summary': summary}
+            if type is not None:
+                self.__atom_summary['type'] = type
+        return self.__atom_summary
+
+    def description(self, description=None, isSummary=False):
+        '''Get or set the description value which is the item synopsis.
+        Description is an RSS only element. For ATOM feeds it is split in
+        summary and content. The isSummary parameter can be used to control
+        which ATOM value is set when setting description.
+
+        :param description: Description of the entry.
+        :param isSummary: If the description should be used as content or
+                          summary.
+        :returns: The entries description.
+        '''
+        if description is not None:
+            self.__rss_description = description
+            if isSummary:
+                self.__atom_summary = {'summary': description}
+            else:
+                self.__atom_content = {'content': description}
+        return self.__rss_description
+
+    def category(self, category=None, replace=False, **kwargs):
+        '''Get or set categories that the entry belongs to.
+
+        This method can be called with:
+        - the fields of a category as keyword arguments
+        - the fields of a category as a dictionary
+        - a list of dictionaries containing the category fields
+
+        A categories has the following fields:
+        - *term* identifies the category
+        - *scheme* identifies the categorization scheme via a URI.
+        - *label* provides a human-readable label for display
+
+        If a label is present it is used for the RSS feeds. Otherwise the term
+        is used. The scheme is used for the domain attribute in RSS.
+
+        :param category:    Dict or list of dicts with data.
+        :param replace: Add or replace old data.
+        :returns: List of category data.
+        '''
+        if category is None and kwargs:
+            category = kwargs
+        if category is not None:
+            if replace or self.__atom_category is None:
+                self.__atom_category = []
+            self.__atom_category += ensure_format(
+                    category,
+                    set(['term', 'scheme', 'label']),
+                    set(['term']))
+            # Map the ATOM categories to RSS categories. Use the atom:label as
+            # name or if not present the atom:term. The atom:scheme is the
+            # rss:domain.
+            self.__rss_category = []
+            for cat in self.__atom_category:
+                rss_cat = {}
+                rss_cat['value'] = cat.get('label', cat['term'])
+                if cat.get('scheme'):
+                    rss_cat['domain'] = cat['scheme']
+                self.__rss_category.append(rss_cat)
+        return self.__atom_category
+
+    def contributor(self, contributor=None, replace=False, **kwargs):
+        '''Get or set the contributor data of the feed. This is an ATOM only
+        value.
+
+        This method can be called with:
+        - the fields of an contributor as keyword arguments
+        - the fields of an contributor as a dictionary
+        - a list of dictionaries containing the contributor fields
+
+        An contributor has the following fields:
+        - *name* conveys a human-readable name for the person.
+        - *uri* contains a home page for the person.
+        - *email* contains an email address for the person.
+
+        :param contributor: Dictionary or list of dictionaries with contributor
+                            data.
+        :param replace: Add or replace old data.
+        :returns: List of contributors as dictionaries.
+        '''
+        if contributor is None and kwargs:
+            contributor = kwargs
+        if contributor is not None:
+            if replace or self.__atom_contributor is None:
+                self.__atom_contributor = []
+            self.__atom_contributor += ensure_format(
+                    contributor, set(['name', 'email', 'uri']), set(['name']))
+        return self.__atom_contributor
+
+    def published(self, published=None):
+        '''Set or get the published value which contains the time of the
+        initial creation or first availability of the entry.
+
+        The value can either be a string which will automatically be parsed or
+        a datetime.datetime object. In any case it is necessary that the value
+        include timezone information.
+
+        :param published: The creation date.
+        :returns: Creation date as datetime.datetime
+        '''
+        if published is not None:
+            if isinstance(published, string_types):
+                published = dateutil.parser.parse(published)
+            if not isinstance(published, datetime):
+                raise ValueError('Invalid datetime format')
+            if published.tzinfo is None:
+                raise ValueError('Datetime object has no timezone info')
+            self.__atom_published = published
+            self.__rss_pubDate = published
+
+        return self.__atom_published
+
+    def pubDate(self, pubDate=None):
+        '''Get or set the pubDate of the entry which indicates when the entry
+        was published. This method is just another name for the published(...)
+        method.
+        '''
+        return self.published(pubDate)
+
+    def pubdate(self, pubDate=None):
+        '''Get or set the pubDate of the entry which indicates when the entry
+        was published. This method is just another name for the published(...)
+        method.
+
+        pubdate(…) is deprecated and may be removed in feedgen ≥ 0.8. Use
+        pubDate(…) instead.
+        '''
+        warnings.warn('pubdate(…) is deprecated and may be removed in feedgen '
+                      '≥ 0.8. Use pubDate(…) instead.')
+        return self.published(pubDate)
+
+    def rights(self, rights=None):
+        '''Get or set the rights value of the entry which conveys information
+        about rights, e.g. copyrights, held in and over the entry. This ATOM
+        value will also set rss:copyright.
+
+        :param rights: Rights information of the feed.
+        :returns: Rights information of the feed.
+        '''
+        if rights is not None:
+            self.__atom_rights = rights
+        return self.__atom_rights
+
+    def comments(self, comments=None):
+        '''Get or set the value of comments which is the URL of the comments
+        page for the item. This is a RSS only value.
+
+        :param comments: URL to the comments page.
+        :returns: URL to the comments page.
+        '''
+        if comments is not None:
+            self.__rss_comments = comments
+        return self.__rss_comments
+
+    def source(self, url=None, title=None):
+        '''Get or set the source for the current feed entry.
+
+        Note that ATOM feeds support a lot more sub elements than title and URL
+        (which is what RSS supports) but these are currently not supported.
+        Patches are welcome.
+
+        :param url: Link to the source.
+        :param title: Title of the linked resource
+        :returns: Source element as dictionaries.
+        '''
+        if url is not None and title is not None:
+            self.__rss_source = {'url': url, 'title': title}
+            self.__atom_source = {'link': url, 'title': title}
+        return self.__rss_source
+
+    def enclosure(self, url=None, length=None, type=None):
+        '''Get or set the value of enclosure which describes a media object
+        that is attached to the item. This is a RSS only value which is
+        represented by link(rel=enclosure) in ATOM. ATOM feeds can furthermore
+        contain several enclosures while RSS may contain only one. That is why
+        this method, if repeatedly called, will add more than one enclosures to
+        the feed.  However, only the last one is used for RSS.
+
+        :param url: URL of the media object.
+        :param length: Size of the media in bytes.
+        :param type: Mimetype of the linked media.
+        :returns: Data of the enclosure element.
+        '''
+        if url is not None:
+            self.link(href=url, rel='enclosure', type=type, length=str(length))
+        return self.__rss_enclosure
+
+    def ttl(self, ttl=None):
+        '''Get or set the ttl value. It is an RSS only element. ttl stands for
+        time to live. It's a number of minutes that indicates how long a
+        channel can be cached before refreshing from the source.
+
+        :param ttl: Integer value representing the time to live.
+        :returns: Time to live of of the entry.
+        '''
+        if ttl is not None:
+            self.__rss_ttl = int(ttl)
+        return self.__rss_ttl
+
+    def load_extension(self, name, atom=True, rss=True):
+        '''Load a specific extension by name.
+
+        :param name: Name of the extension to load.
+        :param atom: If the extension should be used for ATOM feeds.
+        :param rss: If the extension should be used for RSS feeds.
+        '''
+        # Check loaded extensions
+        if not isinstance(self.__extensions, dict):
+            self.__extensions = {}
+        if name in self.__extensions.keys():
+            raise ImportError('Extension already loaded')
+
+        # Load extension
+        extname = name[0].upper() + name[1:] + 'EntryExtension'
+        try:
+            supmod = __import__('feedgen.ext.%s_entry' % name)
+            extmod = getattr(supmod.ext, name + '_entry')
+        except ImportError:
+            # Use FeedExtension module instead
+            supmod = __import__('feedgen.ext.%s' % name)
+            extmod = getattr(supmod.ext, name)
+        ext = getattr(extmod, extname)
+        self.register_extension(name, ext, atom, rss)
+
+    def register_extension(self, namespace, extension_class_entry=None,
+                           atom=True, rss=True):
+        '''Register a specific extension by classes to a namespace.
+
+        :param namespace: namespace for the extension
+        :param extension_class_entry: Class of the entry extension to load.
+        :param atom: If the extension should be used for ATOM feeds.
+        :param rss: If the extension should be used for RSS feeds.
+        '''
+        # Check loaded extensions
+        # `load_extension` ignores the "Extension" suffix.
+        if not isinstance(self.__extensions, dict):
+            self.__extensions = {}
+        if namespace in self.__extensions.keys():
+            raise ImportError('Extension already loaded')
+        if not extension_class_entry:
+            raise ImportError('No extension class')
+
+        extinst = extension_class_entry()
+        setattr(self, namespace, extinst)
+
+        # `load_extension` registry
+        self.__extensions[namespace] = {
+                'inst': extinst,
+                'extension_class_entry': extension_class_entry,
+                'atom': atom,
+                'rss': rss
+                }
diff --git a/feedgen/ext/__init__.py b/feedgen/ext/__init__.py
new file mode 100644
index 0000000..0e2b628
--- /dev/null
+++ b/feedgen/ext/__init__.py
@@ -0,0 +1,6 @@
+# -*- coding: utf-8 -*-
+"""
+    ===========
+    feedgen.ext
+    ===========
+"""
diff --git a/feedgen/ext/base.py b/feedgen/ext/base.py
new file mode 100644
index 0000000..b94826d
--- /dev/null
+++ b/feedgen/ext/base.py
@@ -0,0 +1,44 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen.ext.base
+    ~~~~~~~~~~~~~~~~
+
+    Basic FeedGenerator extension which does nothing but provides all necessary
+    methods.
+
+    :copyright: 2013, Lars Kiesow <lkiesow@uos.de>
+
+    :license: FreeBSD and LGPL, see license.* for more details.
+'''
+
+
+class BaseExtension(object):
+    '''Basic FeedGenerator extension.
+    '''
+    def extend_ns(self):
+        '''Returns a dict that will be used in the namespace map for the feed.
+        '''
+        return dict()
+
+    def extend_rss(self, feed):
+        '''Extend a RSS feed xml structure containing all previously set
+        fields.
+
+        :param feed: The feed xml root element.
+        :returns: The feed root element.
+        '''
+        return feed
+
+    def extend_atom(self, feed):
+        '''Extend an ATOM feed xml structure containing all previously set
+        fields.
+
+        :param feed: The feed xml root element.
+        :returns: The feed root element.
+        '''
+        return feed
+
+
+class BaseEntryExtension(BaseExtension):
+    '''Basic FeedEntry extension.
+    '''
diff --git a/feedgen/ext/dc.py b/feedgen/ext/dc.py
new file mode 100644
index 0000000..466c66d
--- /dev/null
+++ b/feedgen/ext/dc.py
@@ -0,0 +1,407 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen.ext.dc
+    ~~~~~~~~~~~~~~~~~~~
+
+    Extends the FeedGenerator to add Dubline Core Elements to the feeds.
+
+    Descriptions partly taken from
+    http://dublincore.org/documents/dcmi-terms/#elements-coverage
+
+    :copyright: 2013-2017, Lars Kiesow <lkiesow@uos.de>
+
+    :license: FreeBSD and LGPL, see license.* for more details.
+'''
+
+from feedgen.ext.base import BaseExtension
+from feedgen.util import xml_elem
+
+
+class DcBaseExtension(BaseExtension):
+    '''Dublin Core Elements extension for podcasts.
+    '''
+
+    def __init__(self):
+        # http://dublincore.org/documents/usageguide/elements.shtml
+        # http://dublincore.org/documents/dces/
+        # http://dublincore.org/documents/dcmi-terms/
+        self._dcelem_contributor = None
+        self._dcelem_coverage = None
+        self._dcelem_creator = None
+        self._dcelem_date = None
+        self._dcelem_description = None
+        self._dcelem_format = None
+        self._dcelem_identifier = None
+        self._dcelem_language = None
+        self._dcelem_publisher = None
+        self._dcelem_relation = None
+        self._dcelem_rights = None
+        self._dcelem_source = None
+        self._dcelem_subject = None
+        self._dcelem_title = None
+        self._dcelem_type = None
+
+    def extend_ns(self):
+        return {'dc': 'http://purl.org/dc/elements/1.1/'}
+
+    def _extend_xml(self, xml_element):
+        '''Extend xml_element with set DC fields.
+
+        :param xml_element: etree element
+        '''
+        DCELEMENTS_NS = 'http://purl.org/dc/elements/1.1/'
+
+        for elem in ['contributor', 'coverage', 'creator', 'date',
+                     'description', 'language', 'publisher', 'relation',
+                     'rights', 'source', 'subject', 'title', 'type', 'format',
+                     'identifier']:
+            if hasattr(self, '_dcelem_%s' % elem):
+                for val in getattr(self, '_dcelem_%s' % elem) or []:
+                    node = xml_elem('{%s}%s' % (DCELEMENTS_NS, elem),
+                                    xml_element)
+                    node.text = val
+
+    def extend_atom(self, atom_feed):
+        '''Extend an Atom feed with the set DC fields.
+
+        :param atom_feed: The feed root element
+        :returns: The feed root element
+        '''
+
+        self._extend_xml(atom_feed)
+
+        return atom_feed
+
+    def extend_rss(self, rss_feed):
+        '''Extend a RSS feed with the set DC fields.
+
+        :param rss_feed: The feed root element
+        :returns: The feed root element.
+        '''
+        channel = rss_feed[0]
+        self._extend_xml(channel)
+
+        return rss_feed
+
+    def dc_contributor(self, contributor=None, replace=False):
+        '''Get or set the dc:contributor which is an entity responsible for
+        making contributions to the resource.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-contributor
+
+        :param contributor: Contributor or list of contributors.
+        :param replace: Replace already set contributors (default: False).
+        :returns: List of contributors.
+        '''
+        if contributor is not None:
+            if not isinstance(contributor, list):
+                contributor = [contributor]
+            if replace or not self._dcelem_contributor:
+                self._dcelem_contributor = []
+            self._dcelem_contributor += contributor
+        return self._dcelem_contributor
+
+    def dc_coverage(self, coverage=None, replace=True):
+        '''Get or set the dc:coverage which indicated the spatial or temporal
+        topic of the resource, the spatial applicability of the resource, or
+        the jurisdiction under which the resource is relevant.
+
+        Spatial topic and spatial applicability may be a named place or a
+        location specified by its geographic coordinates. Temporal topic may be
+        a named period, date, or date range. A jurisdiction may be a named
+        administrative entity or a geographic place to which the resource
+        applies. Recommended best practice is to use a controlled vocabulary
+        such as the Thesaurus of Geographic Names [TGN]. Where appropriate,
+        named places or time periods can be used in preference to numeric
+        identifiers such as sets of coordinates or date ranges.
+
+        References:
+        [TGN] http://www.getty.edu/research/tools/vocabulary/tgn/index.html
+
+        :param coverage: Coverage of the feed.
+        :param replace: Replace already set coverage (default: True).
+        :returns: Coverage of the feed.
+        '''
+        if coverage is not None:
+            if not isinstance(coverage, list):
+                coverage = [coverage]
+            if replace or not self._dcelem_coverage:
+                self._dcelem_coverage = []
+            self._dcelem_coverage = coverage
+        return self._dcelem_coverage
+
+    def dc_creator(self, creator=None, replace=False):
+        '''Get or set the dc:creator which is an entity primarily responsible
+        for making the resource.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-creator
+
+        :param creator: Creator or list of creators.
+        :param replace: Replace already set creators (default: False).
+        :returns: List of creators.
+        '''
+        if creator is not None:
+            if not isinstance(creator, list):
+                creator = [creator]
+            if replace or not self._dcelem_creator:
+                self._dcelem_creator = []
+            self._dcelem_creator += creator
+        return self._dcelem_creator
+
+    def dc_date(self, date=None, replace=True):
+        '''Get or set the dc:date which describes a point or period of time
+        associated with an event in the lifecycle of the resource.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-date
+
+        :param date: Date or list of dates.
+        :param replace: Replace already set dates (default: True).
+        :returns: List of dates.
+        '''
+        if date is not None:
+            if not isinstance(date, list):
+                date = [date]
+            if replace or not self._dcelem_date:
+                self._dcelem_date = []
+            self._dcelem_date += date
+        return self._dcelem_date
+
+    def dc_description(self, description=None, replace=True):
+        '''Get or set the dc:description which is an account of the resource.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-description
+
+        :param description: Description or list of descriptions.
+        :param replace: Replace already set descriptions (default: True).
+        :returns: List of descriptions.
+        '''
+        if description is not None:
+            if not isinstance(description, list):
+                description = [description]
+            if replace or not self._dcelem_description:
+                self._dcelem_description = []
+            self._dcelem_description += description
+        return self._dcelem_description
+
+    def dc_format(self, format=None, replace=True):
+        '''Get or set the dc:format which describes the file format, physical
+        medium, or dimensions of the resource.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-format
+
+        :param format: Format of the resource or list of formats.
+        :param replace: Replace already set format (default: True).
+        :returns: Format of the resource.
+        '''
+        if format is not None:
+            if not isinstance(format, list):
+                format = [format]
+            if replace or not self._dcelem_format:
+                self._dcelem_format = []
+            self._dcelem_format += format
+        return self._dcelem_format
+
+    def dc_identifier(self, identifier=None, replace=True):
+        '''Get or set the dc:identifier which should be an unambiguous
+        reference to the resource within a given context.
+
+        For more inidentifierion see:
+        http://dublincore.org/documents/dcmi-terms/#elements-identifier
+
+        :param identifier: Identifier of the resource or list of identifiers.
+        :param replace: Replace already set identifier (default: True).
+        :returns: Identifiers of the resource.
+        '''
+        if identifier is not None:
+            if not isinstance(identifier, list):
+                identifier = [identifier]
+            if replace or not self._dcelem_identifier:
+                self._dcelem_identifier = []
+            self._dcelem_identifier += identifier
+        return self._dcelem_identifier
+
+    def dc_language(self, language=None, replace=True):
+        '''Get or set the dc:language which describes a language of the
+        resource.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-language
+
+        :param language: Language or list of languages.
+        :param replace: Replace already set languages (default: True).
+        :returns: List of languages.
+        '''
+        if language is not None:
+            if not isinstance(language, list):
+                language = [language]
+            if replace or not self._dcelem_language:
+                self._dcelem_language = []
+            self._dcelem_language += language
+        return self._dcelem_language
+
+    def dc_publisher(self, publisher=None, replace=False):
+        '''Get or set the dc:publisher which is an entity responsible for
+        making the resource available.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-publisher
+
+        :param publisher: Publisher or list of publishers.
+        :param replace: Replace already set publishers (default: False).
+        :returns: List of publishers.
+        '''
+        if publisher is not None:
+            if not isinstance(publisher, list):
+                publisher = [publisher]
+            if replace or not self._dcelem_publisher:
+                self._dcelem_publisher = []
+            self._dcelem_publisher += publisher
+        return self._dcelem_publisher
+
+    def dc_relation(self, relation=None, replace=False):
+        '''Get or set the dc:relation which describes a related resource.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-relation
+
+        :param relation: Relation or list of relations.
+        :param replace: Replace already set relations (default: False).
+        :returns: List of relations.
+        '''
+        if relation is not None:
+            if not isinstance(relation, list):
+                relation = [relation]
+            if replace or not self._dcelem_relation:
+                self._dcelem_relation = []
+            self._dcelem_relation += relation
+        return self._dcelem_relation
+
+    def dc_rights(self, rights=None, replace=False):
+        '''Get or set the dc:rights which may contain information about rights
+        held in and over the resource.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-rights
+
+        :param rights: Rights information or list of rights information.
+        :param replace: Replace already set rights (default: False).
+        :returns: List of rights information.
+        '''
+        if rights is not None:
+            if not isinstance(rights, list):
+                rights = [rights]
+            if replace or not self._dcelem_rights:
+                self._dcelem_rights = []
+            self._dcelem_rights += rights
+        return self._dcelem_rights
+
+    def dc_source(self, source=None, replace=False):
+        '''Get or set the dc:source which is a related resource from which the
+        described resource is derived.
+
+        The described resource may be derived from the related resource in
+        whole or in part. Recommended best practice is to identify the related
+        resource by means of a string conforming to a formal identification
+        system.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-source
+
+        :param source: Source or list of sources.
+        :param replace: Replace already set sources (default: False).
+        :returns: List of sources.
+        '''
+        if source is not None:
+            if not isinstance(source, list):
+                source = [source]
+            if replace or not self._dcelem_source:
+                self._dcelem_source = []
+            self._dcelem_source += source
+        return self._dcelem_source
+
+    def dc_subject(self, subject=None, replace=False):
+        '''Get or set the dc:subject which describes the topic of the resource.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-subject
+
+        :param subject: Subject or list of subjects.
+        :param replace: Replace already set subjects (default: False).
+        :returns: List of subjects.
+        '''
+        if subject is not None:
+            if not isinstance(subject, list):
+                subject = [subject]
+            if replace or not self._dcelem_subject:
+                self._dcelem_subject = []
+            self._dcelem_subject += subject
+        return self._dcelem_subject
+
+    def dc_title(self, title=None, replace=True):
+        '''Get or set the dc:title which is a name given to the resource.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-title
+
+        :param title: Title or list of titles.
+        :param replace: Replace already set titles (default: False).
+        :returns: List of titles.
+        '''
+        if title is not None:
+            if not isinstance(title, list):
+                title = [title]
+            if replace or not self._dcelem_title:
+                self._dcelem_title = []
+            self._dcelem_title += title
+        return self._dcelem_title
+
+    def dc_type(self, type=None, replace=False):
+        '''Get or set the dc:type which describes the nature or genre of the
+        resource.
+
+        For more information see:
+        http://dublincore.org/documents/dcmi-terms/#elements-type
+
+        :param type: Type or list of types.
+        :param replace: Replace already set types (default: False).
+        :returns: List of types.
+        '''
+        if type is not None:
+            if not isinstance(type, list):
+                type = [type]
+            if replace or not self._dcelem_type:
+                self._dcelem_type = []
+            self._dcelem_type += type
+        return self._dcelem_type
+
+
+class DcExtension(DcBaseExtension):
+    '''Dublin Core Elements extension for podcasts.
+    '''
+
+
+class DcEntryExtension(DcBaseExtension):
+    '''Dublin Core Elements extension for podcasts.
+    '''
+    def extend_atom(self, entry):
+        '''Add dc elements to an atom item. Alters the item itself.
+
+        :param entry: An atom entry element.
+        :returns: The entry element.
+        '''
+        self._extend_xml(entry)
+        return entry
+
+    def extend_rss(self, item):
+        '''Add dc elements to a RSS item. Alters the item itself.
+
+        :param item: A RSS item element.
+        :returns: The item element.
+        '''
+        self._extend_xml(item)
+        return item
diff --git a/feedgen/ext/geo.py b/feedgen/ext/geo.py
new file mode 100644
index 0000000..b6384d4
--- /dev/null
+++ b/feedgen/ext/geo.py
@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen.ext.geo
+    ~~~~~~~~~~~~~~~~~~~
+
+    Extends the FeedGenerator to produce Simple GeoRSS feeds.
+
+    :copyright: 2017, Bob Breznak <bob.breznak@gmail.com>
+
+    :license: FreeBSD and LGPL, see license.* for more details.
+'''
+
+from feedgen.ext.base import BaseExtension
+
+
+class GeoExtension(BaseExtension):
+    '''FeedGenerator extension for Simple GeoRSS.
+    '''
+
+    def extend_ns(self):
+        return {'georss': 'http://www.georss.org/georss'}
diff --git a/feedgen/ext/geo_entry.py b/feedgen/ext/geo_entry.py
new file mode 100644
index 0000000..4c18cfe
--- /dev/null
+++ b/feedgen/ext/geo_entry.py
@@ -0,0 +1,329 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen.ext.geo_entry
+    ~~~~~~~~~~~~~~~~~~~
+
+    Extends the FeedGenerator to produce Simple GeoRSS feeds.
+
+    :copyright: 2017, Bob Breznak <bob.breznak@gmail.com>
+
+    :license: FreeBSD and LGPL, see license.* for more details.
+'''
+import numbers
+import warnings
+
+from feedgen.ext.base import BaseEntryExtension
+from feedgen.util import xml_elem
+
+
+class GeoRSSPolygonInteriorWarning(Warning):
+    """
+    Simple placeholder for warning about ignored polygon interiors.
+
+    Stores the original geom on a ``geom`` attribute (if required warnings are
+    raised as errors).
+    """
+
+    def __init__(self, geom, *args, **kwargs):
+        self.geom = geom
+        super(GeoRSSPolygonInteriorWarning, self).__init__(*args, **kwargs)
+
+    def __str__(self):
+        return '{:d} interiors of polygon ignored'.format(
+            len(self.geom.__geo_interface__['coordinates']) - 1
+        )  # ignore exterior in count
+
+
+class GeoRSSGeometryError(ValueError):
+    """
+    Subclass of ValueError for a GeoRSS geometry error
+
+    Only some geometries are supported in Simple GeoRSS, so if not raise an
+    error. Offending geometry is stored on the ``geom`` attribute.
+    """
+
+    def __init__(self, geom, *args, **kwargs):
+        self.geom = geom
+        super(GeoRSSGeometryError, self).__init__(*args, **kwargs)
+
+    def __str__(self):
+        msg = "Geometry of type '{}' not in Point, Linestring or Polygon"
+        return msg.format(
+            self.geom.__geo_interface__['type']
+        )
+
+
+class GeoEntryExtension(BaseEntryExtension):
+    '''FeedEntry extension for Simple GeoRSS.
+    '''
+
+    def __init__(self):
+        '''Simple GeoRSS tag'''
+        # geometries
+        self.__point = None
+        self.__line = None
+        self.__polygon = None
+        self.__box = None
+
+        # additional properties
+        self.__featuretypetag = None
+        self.__relationshiptag = None
+        self.__featurename = None
+
+        # elevation
+        self.__elev = None
+        self.__floor = None
+
+        # radius
+        self.__radius = None
+
+    def extend_file(self, entry):
+        '''Add additional fields to an RSS item.
+
+        :param feed: The RSS item XML element to use.
+        '''
+
+        GEO_NS = 'http://www.georss.org/georss'
+
+        if self.__point:
+            point = xml_elem('{%s}point' % GEO_NS, entry)
+            point.text = self.__point
+
+        if self.__line:
+            line = xml_elem('{%s}line' % GEO_NS, entry)
+            line.text = self.__line
+
+        if self.__polygon:
+            polygon = xml_elem('{%s}polygon' % GEO_NS, entry)
+            polygon.text = self.__polygon
+
+        if self.__box:
+            box = xml_elem('{%s}box' % GEO_NS, entry)
+            box.text = self.__box
+
+        if self.__featuretypetag:
+            featuretypetag = xml_elem('{%s}featuretypetag' % GEO_NS, entry)
+            featuretypetag.text = self.__featuretypetag
+
+        if self.__relationshiptag:
+            relationshiptag = xml_elem('{%s}relationshiptag' % GEO_NS, entry)
+            relationshiptag.text = self.__relationshiptag
+
+        if self.__featurename:
+            featurename = xml_elem('{%s}featurename' % GEO_NS, entry)
+            featurename.text = self.__featurename
+
+        if self.__elev:
+            elevation = xml_elem('{%s}elev' % GEO_NS, entry)
+            elevation.text = str(self.__elev)
+
+        if self.__floor:
+            floor = xml_elem('{%s}floor' % GEO_NS, entry)
+            floor.text = str(self.__floor)
+
+        if self.__radius:
+            radius = xml_elem('{%s}radius' % GEO_NS, entry)
+            radius.text = str(self.__radius)
+
+        return entry
+
+    def extend_rss(self, entry):
+        return self.extend_file(entry)
+
+    def extend_atom(self, entry):
+        return self.extend_file(entry)
+
+    def point(self, point=None):
+        '''Get or set the georss:point of the entry.
+
+        :param point: The GeoRSS formatted point (i.e. "42.36 -71.05")
+        :returns: The current georss:point of the entry.
+        '''
+
+        if point is not None:
+            self.__point = point
+
+        return self.__point
+
+    def line(self, line=None):
+        '''Get or set the georss:line of the entry
+
+        :param point: The GeoRSS formatted line (i.e. "45.256 -110.45 46.46
+                      -109.48 43.84 -109.86")
+        :return: The current georss:line of the entry
+        '''
+        if line is not None:
+            self.__line = line
+
+        return self.__line
+
+    def polygon(self, polygon=None):
+        '''Get or set the georss:polygon of the entry
+
+        :param polygon: The GeoRSS formatted polygon (i.e. "45.256 -110.45
+                        46.46 -109.48 43.84 -109.86 45.256 -110.45")
+        :return: The current georss:polygon of the entry
+        '''
+        if polygon is not None:
+            self.__polygon = polygon
+
+        return self.__polygon
+
+    def box(self, box=None):
+        '''
+        Get or set the georss:box of the entry
+
+        :param box: The GeoRSS formatted box (i.e. "42.943 -71.032 43.039
+                    -69.856")
+        :return: The current georss:box of the entry
+        '''
+        if box is not None:
+            self.__box = box
+
+        return self.__box
+
+    def featuretypetag(self, featuretypetag=None):
+        '''
+        Get or set the georss:featuretypetag of the entry
+
+        :param featuretypetag: The GeoRSS feaaturertyptag (e.g. "city")
+        :return: The current georss:featurertypetag
+        '''
+        if featuretypetag is not None:
+            self.__featuretypetag = featuretypetag
+
+        return self.__featuretypetag
+
+    def relationshiptag(self, relationshiptag=None):
+        '''
+        Get or set the georss:relationshiptag of the entry
+
+        :param relationshiptag: The GeoRSS relationshiptag (e.g.
+                                "is-centred-at")
+        :return: the current georss:relationshiptag
+        '''
+        if relationshiptag is not None:
+            self.__relationshiptag = relationshiptag
+
+        return self.__relationshiptag
+
+    def featurename(self, featurename=None):
+        '''
+        Get or set the georss:featurename of the entry
+
+        :param featuretypetag: The GeoRSS featurename (e.g. "Footscray")
+        :return: the current georss:featurename
+        '''
+        if featurename is not None:
+            self.__featurename = featurename
+
+        return self.__featurename
+
+    def elev(self, elev=None):
+        '''
+        Get or set the georss:elev of the entry
+
+        :param elev: The GeoRSS elevation (e.g. 100.3)
+        :type elev: numbers.Number
+        :return: the current georss:elev
+        '''
+        if elev is not None:
+            if not isinstance(elev, numbers.Number):
+                raise ValueError("elev tag must be numeric: {}".format(elev))
+
+            self.__elev = elev
+
+        return self.__elev
+
+    def floor(self, floor=None):
+        '''
+        Get or set the georss:floor of the entry
+
+        :param floor: The GeoRSS floor (e.g. 4)
+        :type floor: int
+        :return: the current georss:floor
+        '''
+        if floor is not None:
+            if not isinstance(floor, int):
+                raise ValueError("floor tag must be int: {}".format(floor))
+
+            self.__floor = floor
+
+        return self.__floor
+
+    def radius(self, radius=None):
+        '''
+        Get or set the georss:radius of the entry
+
+        :param radius: The GeoRSS radius (e.g. 100.3)
+        :type radius: numbers.Number
+        :return: the current georss:radius
+        '''
+        if radius is not None:
+            if not isinstance(radius, numbers.Number):
+                raise ValueError(
+                    "radius tag must be numeric: {}".format(radius)
+                )
+
+            self.__radius = radius
+
+        return self.__radius
+
+    def geom_from_geo_interface(self, geom):
+        '''
+        Generate a georss geometry from some Python object with a
+        ``__geo_interface__`` property (see the `geo_interface specification by
+        Sean Gillies`_geointerface )
+
+        Note only a subset of GeoJSON (see `geojson.org`_geojson ) can be
+        easily converted to GeoRSS:
+
+        - Point
+        - LineString
+        - Polygon (if there are holes / donuts in the polygons a warning will
+          be generated
+
+        Other GeoJson types will raise a ``ValueError``.
+
+        .. note:: The geometry is assumed to be x, y as longitude, latitude in
+           the WGS84 projection.
+
+        .. _geointerface: https://gist.github.com/sgillies/2217756
+        .. _geojson: https://geojson.org/
+
+        :param geom: Geometry object with a __geo_interface__ property
+        :return: the formatted GeoRSS geometry
+        '''
+        geojson = geom.__geo_interface__
+
+        if geojson['type'] not in ('Point', 'LineString', 'Polygon'):
+            raise GeoRSSGeometryError(geom)
+
+        if geojson['type'] == 'Point':
+
+            coords = '{:f} {:f}'.format(
+                geojson['coordinates'][1],  # latitude is y
+                geojson['coordinates'][0]
+            )
+            return self.point(coords)
+
+        elif geojson['type'] == 'LineString':
+
+            coords = ' '.join(
+                '{:f} {:f}'.format(vertex[1], vertex[0])
+                for vertex in
+                geojson['coordinates']
+            )
+            return self.line(coords)
+
+        elif geojson['type'] == 'Polygon':
+
+            if len(geojson['coordinates']) > 1:
+                warnings.warn(GeoRSSPolygonInteriorWarning(geom))
+
+            coords = ' '.join(
+                '{:f} {:f}'.format(vertex[1], vertex[0])
+                for vertex in
+                geojson['coordinates'][0]
+            )
+            return self.polygon(coords)
diff --git a/feedgen/ext/media.py b/feedgen/ext/media.py
new file mode 100644
index 0000000..74a5317
--- /dev/null
+++ b/feedgen/ext/media.py
@@ -0,0 +1,183 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen.ext.media
+    ~~~~~~~~~~~~~~~~~
+
+    Extends the feedgen to produce media tags.
+
+    :copyright: 2013-2017, Lars Kiesow <lkiesow@uos.de>
+
+    :license: FreeBSD and LGPL, see license.* for more details.
+'''
+
+from feedgen.ext.base import BaseEntryExtension, BaseExtension
+from feedgen.util import ensure_format, xml_elem
+
+MEDIA_NS = 'http://search.yahoo.com/mrss/'
+
+
+class MediaExtension(BaseExtension):
+    '''FeedGenerator extension for torrent feeds.
+    '''
+
+    def extend_ns(self):
+        return {'media': MEDIA_NS}
+
+
+class MediaEntryExtension(BaseEntryExtension):
+    '''FeedEntry extension for media tags.
+    '''
+
+    def __init__(self):
+        self.__media_content = []
+        self.__media_thumbnail = []
+
+    def extend_atom(self, entry):
+        '''Add additional fields to an RSS item.
+
+        :param feed: The RSS item XML element to use.
+        '''
+
+        groups = {None: entry}
+        for media_content in self.__media_content:
+            # Define current media:group
+            group = groups.get(media_content.get('group'))
+            if group is None:
+                group = xml_elem('{%s}group' % MEDIA_NS, entry)
+                groups[media_content.get('group')] = group
+            # Add content
+            content = xml_elem('{%s}content' % MEDIA_NS, group)
+            for attr in ('url', 'fileSize', 'type', 'medium', 'isDefault',
+                         'expression', 'bitrate', 'framerate', 'samplingrate',
+                         'channels', 'duration', 'height', 'width', 'lang'):
+                if media_content.get(attr):
+                    content.set(attr, media_content[attr])
+
+        for media_thumbnail in self.__media_thumbnail:
+            # Define current media:group
+            group = groups.get(media_thumbnail.get('group'))
+            if group is None:
+                group = xml_elem('{%s}group' % MEDIA_NS, entry)
+                groups[media_thumbnail.get('group')] = group
+            # Add thumbnails
+            thumbnail = xml_elem('{%s}thumbnail' % MEDIA_NS, group)
+            for attr in ('url', 'height', 'width', 'time'):
+                if media_thumbnail.get(attr):
+                    thumbnail.set(attr, media_thumbnail[attr])
+
+        return entry
+
+    def extend_rss(self, item):
+        return self.extend_atom(item)
+
+    def content(self, content=None, replace=False, group='default', **kwargs):
+        '''Get or set media:content data.
+
+        This method can be called with:
+        - the fields of a media:content as keyword arguments
+        - the fields of a media:content as a dictionary
+        - a list of dictionaries containing the media:content fields
+
+        <media:content> is a sub-element of either <item> or <media:group>.
+        Media objects that are not the same content should not be included in
+        the same <media:group> element. The sequence of these items implies
+        the order of presentation. While many of the attributes appear to be
+        audio/video specific, this element can be used to publish any type
+        of media. It contains 14 attributes, most of which are optional.
+
+        media:content has the following fields:
+        - *url* should specify the direct URL to the media object.
+        - *fileSize* number of bytes of the media object.
+        - *type* standard MIME type of the object.
+        - *medium* type of object (image | audio | video | document |
+          executable).
+        - *isDefault* determines if this is the default object.
+        - *expression* determines if the object is a sample or the full version
+          of the object, or even if it is a continuous stream (sample | full |
+          nonstop).
+        - *bitrate* kilobits per second rate of media.
+        - *framerate* number of frames per second for the media object.
+        - *samplingrate* number of samples per second taken to create the media
+          object. It is expressed in thousands of samples per second (kHz).
+        - *channels* number of audio channels in the media object.
+        - *duration* number of seconds the media object plays.
+        - *height* height of the media object.
+        - *width* width of the media object.
+        - *lang* is the primary language encapsulated in the media object.
+
+        :param content: Dictionary or list of dictionaries with content data.
+        :param replace: Add or replace old data.
+        :param group: Media group to put this content in.
+
+        :returns: The media content tag.
+        '''
+        # Handle kwargs
+        if content is None and kwargs:
+            content = kwargs
+        # Handle new data
+        if content is not None:
+            # Reset data if we want to replace them
+            if replace or self.__media_content is None:
+                self.__media_content = []
+            # Ensure list
+            if not isinstance(content, list):
+                content = [content]
+            # define media group
+            for c in content:
+                c['group'] = c.get('group', group)
+            self.__media_content += ensure_format(
+                    content,
+                    set(['url', 'fileSize', 'type', 'medium', 'isDefault',
+                         'expression', 'bitrate', 'framerate', 'samplingrate',
+                         'channels', 'duration', 'height', 'width', 'lang',
+                         'group']),
+                    set(['url', 'group']))
+        return self.__media_content
+
+    def thumbnail(self, thumbnail=None, replace=False, group='default',
+                  **kwargs):
+        '''Get or set media:thumbnail data.
+
+        This method can be called with:
+        - the fields of a media:content as keyword arguments
+        - the fields of a media:content as a dictionary
+        - a list of dictionaries containing the media:content fields
+
+        Allows particular images to be used as representative images for
+        the media object. If multiple thumbnails are included, and time
+        coding is not at play, it is assumed that the images are in order
+        of importance. It has one required attribute and three optional
+        attributes.
+
+        media:thumbnail has the following fields:
+        - *url* should specify the direct URL to the media object.
+        - *height* height of the media object.
+        - *width* width of the media object.
+        - *time* specifies the time offset in relation to the media object.
+
+        :param thumbnail: Dictionary or list of dictionaries with thumbnail
+                          data.
+        :param replace: Add or replace old data.
+        :param group: Media group to put this content in.
+
+        :returns: The media thumbnail tag.
+        '''
+        # Handle kwargs
+        if thumbnail is None and kwargs:
+            thumbnail = kwargs
+        # Handle new data
+        if thumbnail is not None:
+            # Reset data if we want to replace them
+            if replace or self.__media_thumbnail is None:
+                self.__media_thumbnail = []
+            # Ensure list
+            if not isinstance(thumbnail, list):
+                thumbnail = [thumbnail]
+            # Define media group
+            for t in thumbnail:
+                t['group'] = t.get('group', group)
+            self.__media_thumbnail += ensure_format(
+                    thumbnail,
+                    set(['url', 'height', 'width', 'time', 'group']),
+                    set(['url', 'group']))
+        return self.__media_thumbnail
diff --git a/feedgen/ext/podcast.py b/feedgen/ext/podcast.py
new file mode 100644
index 0000000..c535392
--- /dev/null
+++ b/feedgen/ext/podcast.py
@@ -0,0 +1,388 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen.ext.podcast
+    ~~~~~~~~~~~~~~~~~~~
+
+    Extends the FeedGenerator to produce podcasts.
+
+    :copyright: 2013, Lars Kiesow <lkiesow@uos.de>
+
+    :license: FreeBSD and LGPL, see license.* for more details.
+'''
+
+from feedgen.compat import string_types
+from feedgen.ext.base import BaseExtension
+from feedgen.util import ensure_format, xml_elem
+
+
+class PodcastExtension(BaseExtension):
+    '''FeedGenerator extension for podcasts.
+    '''
+
+    def __init__(self):
+        # ITunes tags
+        # http://www.apple.com/itunes/podcasts/specs.html#rss
+        self.__itunes_author = None
+        self.__itunes_block = None
+        self.__itunes_category = None
+        self.__itunes_image = None
+        self.__itunes_explicit = None
+        self.__itunes_complete = None
+        self.__itunes_new_feed_url = None
+        self.__itunes_owner = None
+        self.__itunes_subtitle = None
+        self.__itunes_summary = None
+        self.__itunes_type = None
+
+    def extend_ns(self):
+        return {'itunes': 'http://www.itunes.com/dtds/podcast-1.0.dtd'}
+
+    def extend_rss(self, rss_feed):
+        '''Extend an RSS feed root with set itunes fields.
+
+        :returns: The feed root element.
+        '''
+        ITUNES_NS = 'http://www.itunes.com/dtds/podcast-1.0.dtd'
+        channel = rss_feed[0]
+
+        if self.__itunes_author:
+            author = xml_elem('{%s}author' % ITUNES_NS, channel)
+            author.text = self.__itunes_author
+
+        if self.__itunes_block is not None:
+            block = xml_elem('{%s}block' % ITUNES_NS, channel)
+            block.text = 'yes' if self.__itunes_block else 'no'
+
+        for c in self.__itunes_category or []:
+            if not c.get('cat'):
+                continue
+            category = channel.find(
+                    '{%s}category[@text="%s"]' % (ITUNES_NS, c.get('cat')))
+            if category is None:
+                category = xml_elem('{%s}category' % ITUNES_NS, channel)
+                category.attrib['text'] = c.get('cat')
+
+            if c.get('sub'):
+                subcategory = xml_elem('{%s}category' % ITUNES_NS, category)
+                subcategory.attrib['text'] = c.get('sub')
+
+        if self.__itunes_image:
+            image = xml_elem('{%s}image' % ITUNES_NS, channel)
+            image.attrib['href'] = self.__itunes_image
+
+        if self.__itunes_explicit in ('yes', 'no', 'clean'):
+            explicit = xml_elem('{%s}explicit' % ITUNES_NS, channel)
+            explicit.text = self.__itunes_explicit
+
+        if self.__itunes_complete in ('yes', 'no'):
+            complete = xml_elem('{%s}complete' % ITUNES_NS, channel)
+            complete.text = self.__itunes_complete
+
+        if self.__itunes_new_feed_url:
+            new_feed_url = xml_elem('{%s}new-feed-url' % ITUNES_NS, channel)
+            new_feed_url.text = self.__itunes_new_feed_url
+
+        if self.__itunes_owner:
+            owner = xml_elem('{%s}owner' % ITUNES_NS, channel)
+            owner_name = xml_elem('{%s}name' % ITUNES_NS, owner)
+            owner_name.text = self.__itunes_owner.get('name')
+            owner_email = xml_elem('{%s}email' % ITUNES_NS, owner)
+            owner_email.text = self.__itunes_owner.get('email')
+
+        if self.__itunes_subtitle:
+            subtitle = xml_elem('{%s}subtitle' % ITUNES_NS, channel)
+            subtitle.text = self.__itunes_subtitle
+
+        if self.__itunes_summary:
+            summary = xml_elem('{%s}summary' % ITUNES_NS, channel)
+            summary.text = self.__itunes_summary
+
+        if self.__itunes_type in ('episodic', 'serial'):
+            type = xml_elem('{%s}type' % ITUNES_NS, channel)
+            type.text = self.__itunes_type
+
+        return rss_feed
+
+    def itunes_author(self, itunes_author=None):
+        '''Get or set the itunes:author. The content of this tag is shown in
+        the Artist column in iTunes. If the tag is not present, iTunes uses the
+        contents of the <author> tag. If <itunes:author> is not present at the
+        feed level, iTunes will use the contents of <managingEditor>.
+
+        :param itunes_author: The author of the podcast.
+        :returns: The author of the podcast.
+        '''
+        if itunes_author is not None:
+            self.__itunes_author = itunes_author
+        return self.__itunes_author
+
+    def itunes_block(self, itunes_block=None):
+        '''Get or set the ITunes block attribute. Use this to prevent the
+        entire podcast from appearing in the iTunes podcast directory.
+
+        :param itunes_block: Block the podcast.
+        :returns: If the podcast is blocked.
+        '''
+        if itunes_block is not None:
+            self.__itunes_block = itunes_block
+        return self.__itunes_block
+
+    def itunes_category(self, itunes_category=None, replace=False, **kwargs):
+        '''Get or set the ITunes category which appears in the category column
+        and in iTunes Store Browser.
+
+        The (sub-)category has to be one from the values defined at
+        http://www.apple.com/itunes/podcasts/specs.html#categories
+
+        This method can be called with:
+
+        - the fields of an itunes_category as keyword arguments
+        - the fields of an itunes_category as a dictionary
+        - a list of dictionaries containing the itunes_category fields
+
+        An itunes_category has the following fields:
+
+        - *cat* name for a category.
+        - *sub* name for a subcategory, child of category
+
+        If a podcast has more than one subcategory from the same category, the
+        category is called more than once.
+
+        Likei the parameter::
+
+            [{"cat":"Arts","sub":"Design"},{"cat":"Arts","sub":"Food"}]
+
+        …would become::
+
+            <itunes:category text="Arts">
+                <itunes:category text="Design"/>
+                <itunes:category text="Food"/>
+            </itunes:category>
+
+
+        :param itunes_category: Dictionary or list of dictionaries with
+                                itunes_category data.
+        :param replace: Add or replace old data.
+        :returns: List of itunes_categories as dictionaries.
+
+        ---
+
+        **Important note about deprecated parameter syntax:** Old version of
+        the feedgen did only support one category plus one subcategory which
+        would be passed to this ducntion as first two parameters. For
+        compatibility reasons, this still works but should not be used any may
+        be removed at any time.
+        '''
+        # Ensure old API still works for now. Note that the API is deprecated
+        # and this fallback may be removed at any time.
+        if isinstance(itunes_category, string_types):
+            itunes_category = {'cat': itunes_category}
+            if replace:
+                itunes_category['sub'] = replace
+            replace = True
+        if itunes_category is None and kwargs:
+            itunes_category = kwargs
+        if itunes_category is not None:
+            if replace or self.__itunes_category is None:
+                self.__itunes_category = []
+            self.__itunes_category += ensure_format(itunes_category,
+                                                    set(['cat', 'sub']),
+                                                    set(['cat']))
+        return self.__itunes_category
+
+    def itunes_image(self, itunes_image=None):
+        '''Get or set the image for the podcast. This tag specifies the artwork
+        for your podcast. Put the URL to the image in the href attribute.
+        iTunes prefers square .jpg images that are at least 1400x1400 pixels,
+        which is different from what is specified for the standard RSS image
+        tag. In order for a podcast to be eligible for an iTunes Store feature,
+        the accompanying image must be at least 1400x1400 pixels.
+
+        iTunes supports images in JPEG and PNG formats with an RGB color space
+        (CMYK is not supported). The URL must end in ".jpg" or ".png". If the
+        <itunes:image> tag is not present, iTunes will use the contents of the
+        RSS image tag.
+
+        If you change your podcast’s image, also change the file’s name. iTunes
+        may not change the image if it checks your feed and the image URL is
+        the same. The server hosting your cover art image must allow HTTP head
+        requests for iTS to be able to automatically update your cover art.
+
+        :param itunes_image: Image of the podcast.
+        :returns: Image of the podcast.
+        '''
+        if itunes_image is not None:
+            if itunes_image.endswith('.jpg') or itunes_image.endswith('.png'):
+                self.__itunes_image = itunes_image
+            else:
+                ValueError('Image file must be png or jpg')
+        return self.__itunes_image
+
+    def itunes_explicit(self, itunes_explicit=None):
+        '''Get or the the itunes:explicit value of the podcast. This tag should
+        be used to indicate whether your podcast contains explicit material.
+        The three values for this tag are "yes", "no", and "clean".
+
+        If you populate this tag with "yes", an "explicit" parental advisory
+        graphic will appear next to your podcast artwork on the iTunes Store
+        and in the Name column in iTunes. If the value is "clean", the parental
+        advisory type is considered Clean, meaning that no explicit language or
+        adult content is included anywhere in the episodes, and a "clean"
+        graphic will appear. If the explicit tag is present and has any other
+        value (e.g., "no"), you see no indicator — blank is the default
+        advisory type.
+
+        :param itunes_explicit: If the podcast contains explicit material.
+        :returns: If the podcast contains explicit material.
+        '''
+        if itunes_explicit is not None:
+            if itunes_explicit not in ('', 'yes', 'no', 'clean'):
+                raise ValueError('Invalid value for explicit tag')
+            self.__itunes_explicit = itunes_explicit
+        return self.__itunes_explicit
+
+    def itunes_complete(self, itunes_complete=None):
+        '''Get or set the itunes:complete value of the podcast. This tag can be
+        used to indicate the completion of a podcast.
+
+        If you populate this tag with "yes", you are indicating that no more
+        episodes will be added to the podcast. If the <itunes:complete> tag is
+        present and has any other value (e.g. “no”), it will have no effect on
+        the podcast.
+
+        :param itunes_complete: If the podcast is complete.
+        :returns: If the podcast is complete.
+        '''
+        if itunes_complete is not None:
+            if itunes_complete not in ('yes', 'no', '', True, False):
+                raise ValueError('Invalid value for complete tag')
+            if itunes_complete is True:
+                itunes_complete = 'yes'
+            if itunes_complete is False:
+                itunes_complete = 'no'
+            self.__itunes_complete = itunes_complete
+        return self.__itunes_complete
+
+    def itunes_new_feed_url(self, itunes_new_feed_url=None):
+        '''Get or set the new-feed-url property of the podcast. This tag allows
+        you to change the URL where the podcast feed is located
+
+        After adding the tag to your old feed, you should maintain the old feed
+        for 48 hours before retiring it. At that point, iTunes will have
+        updated the directory with the new feed URL.
+
+        :param itunes_new_feed_url: New feed URL.
+        :returns: New feed URL.
+        '''
+        if itunes_new_feed_url is not None:
+            self.__itunes_new_feed_url = itunes_new_feed_url
+        return self.__itunes_new_feed_url
+
+    def itunes_owner(self, name=None, email=None):
+        '''Get or set the itunes:owner of the podcast. This tag contains
+        information that will be used to contact the owner of the podcast for
+        communication specifically about the podcast. It will not be publicly
+        displayed.
+
+        :param itunes_owner: The owner of the feed.
+        :returns: Data of the owner of the feed.
+        '''
+        if name is not None:
+            if name and email:
+                self.__itunes_owner = {'name': name, 'email': email}
+            elif not name and not email:
+                self.__itunes_owner = None
+            else:
+                raise ValueError('Both name and email have to be set.')
+        return self.__itunes_owner
+
+    def itunes_subtitle(self, itunes_subtitle=None):
+        '''Get or set the itunes:subtitle value for the podcast. The contents
+        of this tag are shown in the Description column in iTunes. The subtitle
+        displays best if it is only a few words long.
+
+        :param itunes_subtitle: Subtitle of the podcast.
+        :returns: Subtitle of the podcast.
+        '''
+        if itunes_subtitle is not None:
+            self.__itunes_subtitle = itunes_subtitle
+        return self.__itunes_subtitle
+
+    def itunes_summary(self, itunes_summary=None):
+        '''Get or set the itunes:summary value for the podcast. The contents of
+        this tag are shown in a separate window that appears when the "circled
+        i" in the Description column is clicked. It also appears on the iTunes
+        page for your podcast. This field can be up to 4000 characters. If
+        `<itunes:summary>` is not included, the contents of the <description>
+        tag are used.
+
+        :param itunes_summary: Summary of the podcast.
+        :returns: Summary of the podcast.
+        '''
+        if itunes_summary is not None:
+            self.__itunes_summary = itunes_summary
+        return self.__itunes_summary
+
+    def itunes_type(self, itunes_type=None):
+        '''Get or set the itunes:type value of the podcast. This tag should
+        be used to indicate the type of your podcast.
+        The two values for this tag are "episodic" and "serial".
+
+        If your show is Serial you must use this tag.
+
+        Specify episodic when episodes are intended to be consumed without any
+        specific order. Apple Podcasts will present newest episodes first and
+        display the publish date (required) of each episode. If organized into
+        seasons, the newest season will be presented first - otherwise,
+        episodes will be grouped by year published, newest first.
+
+         Specify serial when episodes are intended to be consumed in sequential
+         order. Apple Podcasts will present the oldest episodes first and
+         display the episode numbers (required) of each episode. If organized
+         into seasons, the newest season will be presented first and
+         <itunes:episode> numbers must be given for each episode.
+
+        :param itunes_type: The type of the podcast
+        :returns: type of the pdocast.
+        '''
+        if itunes_type is not None:
+            if itunes_type not in ('episodic', 'serial'):
+                raise ValueError('Invalid value for type tag')
+            self.__itunes_type = itunes_type
+        return self.__itunes_type
+
+    _itunes_categories = {
+            'Arts': [
+                'Design', 'Fashion & Beauty', 'Food', 'Literature',
+                'Performing Arts', 'Visual Arts'],
+            'Business': [
+                'Business News', 'Careers', 'Investing',
+                'Management & Marketing', 'Shopping'],
+            'Comedy': [],
+            'Education': [
+                'Education', 'Education Technology', 'Higher Education',
+                'K-12', 'Language Courses', 'Training'],
+            'Games & Hobbies': [
+                'Automotive', 'Aviation', 'Hobbies', 'Other Games',
+                'Video Games'],
+            'Government & Organizations': [
+                'Local', 'National', 'Non-Profit', 'Regional'],
+            'Health': [
+                'Alternative Health', 'Fitness & Nutrition', 'Self-Help',
+                'Sexuality'],
+            'Kids & Family': [],
+            'Music': [],
+            'News & Politics': [],
+            'Religion & Spirituality': [
+                'Buddhism', 'Christianity', 'Hinduism', 'Islam', 'Judaism',
+                'Other', 'Spirituality'],
+            'Science & Medicine': [
+                'Medicine', 'Natural Sciences', 'Social Sciences'],
+            'Society & Culture': [
+                'History', 'Personal Journals', 'Philosophy',
+                'Places & Travel'],
+            'Sports & Recreation': [
+                'Amateur', 'College & High School', 'Outdoor', 'Professional'],
+            'Technology': [
+                'Gadgets', 'Tech News', 'Podcasting', 'Software How-To'],
+            'TV & Film': []}
diff --git a/feedgen/ext/podcast_entry.py b/feedgen/ext/podcast_entry.py
new file mode 100644
index 0000000..2d60c2d
--- /dev/null
+++ b/feedgen/ext/podcast_entry.py
@@ -0,0 +1,321 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen.ext.podcast_entry
+    ~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Extends the feedgen to produce podcasts.
+
+    :copyright: 2013-2016, Lars Kiesow <lkiesow@uos.de>
+
+    :license: FreeBSD and LGPL, see license.* for more details.
+'''
+
+from feedgen.ext.base import BaseEntryExtension
+from feedgen.util import xml_elem
+
+
+class PodcastEntryExtension(BaseEntryExtension):
+    '''FeedEntry extension for podcasts.
+    '''
+
+    def __init__(self):
+        # ITunes tags
+        # http://www.apple.com/itunes/podcasts/specs.html#rss
+        self.__itunes_author = None
+        self.__itunes_block = None
+        self.__itunes_image = None
+        self.__itunes_duration = None
+        self.__itunes_explicit = None
+        self.__itunes_is_closed_captioned = None
+        self.__itunes_order = None
+        self.__itunes_subtitle = None
+        self.__itunes_summary = None
+        self.__itunes_season = None
+        self.__itunes_episode = None
+        self.__itunes_title = None
+        self.__itunes_episode_type = None
+
+    def extend_rss(self, entry):
+        '''Add additional fields to an RSS item.
+
+        :param feed: The RSS item XML element to use.
+        '''
+        ITUNES_NS = 'http://www.itunes.com/dtds/podcast-1.0.dtd'
+
+        if self.__itunes_author:
+            author = xml_elem('{%s}author' % ITUNES_NS, entry)
+            author.text = self.__itunes_author
+
+        if self.__itunes_block is not None:
+            block = xml_elem('{%s}block' % ITUNES_NS, entry)
+            block.text = 'yes' if self.__itunes_block else 'no'
+
+        if self.__itunes_image:
+            image = xml_elem('{%s}image' % ITUNES_NS, entry)
+            image.attrib['href'] = self.__itunes_image
+
+        if self.__itunes_duration:
+            duration = xml_elem('{%s}duration' % ITUNES_NS, entry)
+            duration.text = self.__itunes_duration
+
+        if self.__itunes_explicit in ('yes', 'no', 'clean'):
+            explicit = xml_elem('{%s}explicit' % ITUNES_NS, entry)
+            explicit.text = self.__itunes_explicit
+
+        if self.__itunes_is_closed_captioned is not None:
+            is_closed_captioned = xml_elem(
+                    '{%s}isClosedCaptioned' % ITUNES_NS, entry)
+            if self.__itunes_is_closed_captioned:
+                is_closed_captioned.text = 'yes'
+            else:
+                is_closed_captioned.text = 'no'
+
+        if self.__itunes_order is not None and self.__itunes_order >= 0:
+            order = xml_elem('{%s}order' % ITUNES_NS, entry)
+            order.text = str(self.__itunes_order)
+
+        if self.__itunes_subtitle:
+            subtitle = xml_elem('{%s}subtitle' % ITUNES_NS, entry)
+            subtitle.text = self.__itunes_subtitle
+
+        if self.__itunes_summary:
+            summary = xml_elem('{%s}summary' % ITUNES_NS, entry)
+            summary.text = self.__itunes_summary
+
+        if self.__itunes_season:
+            season = xml_elem('{%s}season' % ITUNES_NS, entry)
+            season.text = str(self.__itunes_season)
+
+        if self.__itunes_episode:
+            episode = xml_elem('{%s}episode' % ITUNES_NS, entry)
+            episode.text = str(self.__itunes_episode)
+
+        if self.__itunes_title:
+            title = xml_elem('{%s}title' % ITUNES_NS, entry)
+            title.text = self.__itunes_title
+
+        if self.__itunes_episode_type in ('full', 'trailer', 'bonus'):
+            episode_type = xml_elem('{%s}episodeType' % ITUNES_NS, entry)
+            episode_type.text = self.__itunes_episode_type
+        return entry
+
+    def itunes_author(self, itunes_author=None):
+        '''Get or set the itunes:author of the podcast episode. The content of
+        this tag is shown in the Artist column in iTunes. If the tag is not
+        present, iTunes uses the contents of the <author> tag. If
+        <itunes:author> is not present at the feed level, iTunes will use the
+        contents of <managingEditor>.
+
+        :param itunes_author: The author of the podcast.
+        :returns: The author of the podcast.
+        '''
+        if itunes_author is not None:
+            self.__itunes_author = itunes_author
+        return self.__itunes_author
+
+    def itunes_block(self, itunes_block=None):
+        '''Get or set the ITunes block attribute. Use this to prevent episodes
+        from appearing in the iTunes podcast directory.
+
+        :param itunes_block: Block podcast episodes.
+        :returns: If the podcast episode is blocked.
+        '''
+        if itunes_block is not None:
+            self.__itunes_block = itunes_block
+        return self.__itunes_block
+
+    def itunes_image(self, itunes_image=None):
+        '''Get or set the image for the podcast episode. This tag specifies the
+        artwork for your podcast. Put the URL to the image in the href
+        attribute.  iTunes prefers square .jpg images that are at least
+        1400x1400 pixels, which is different from what is specified for the
+        standard RSS image tag.  In order for a podcast to be eligible for an
+        iTunes Store feature, the accompanying image must be at least 1400x1400
+        pixels.
+
+        iTunes supports images in JPEG and PNG formats with an RGB color space
+        (CMYK is not supported). The URL must end in ".jpg" or ".png". If the
+        <itunes:image> tag is not present, iTunes will use the contents of the
+        RSS image tag.
+
+        If you change your podcast’s image, also change the file’s name. iTunes
+        may not change the image if it checks your feed and the image URL is
+        the same. The server hosting your cover art image must allow HTTP head
+        requests for iTS to be able to automatically update your cover art.
+
+        :param itunes_image: Image of the podcast.
+        :returns: Image of the podcast.
+        '''
+        if itunes_image is not None:
+            if itunes_image.endswith('.jpg') or itunes_image.endswith('.png'):
+                self.__itunes_image = itunes_image
+            else:
+                raise ValueError('Image file must be png or jpg')
+        return self.__itunes_image
+
+    def itunes_duration(self, itunes_duration=None):
+        '''Get or set the duration of the podcast episode. The content of this
+        tag is shown in the Time column in iTunes.
+
+        The tag can be formatted HH:MM:SS, H:MM:SS, MM:SS, or M:SS (H = hours,
+        M = minutes, S = seconds). If an integer is provided (no colon
+        present), the value is assumed to be in seconds. If one colon is
+        present, the number to the left is assumed to be minutes, and the
+        number to the right is assumed to be seconds. If more than two colons
+        are present, the numbers farthest to the right are ignored.
+
+        :param itunes_duration: Duration of the podcast episode.
+        :returns: Duration of the podcast episode.
+        '''
+        if itunes_duration is not None:
+            itunes_duration = str(itunes_duration)
+            if len(itunes_duration.split(':')) > 3 or \
+                    itunes_duration.lstrip('0123456789:') != '':
+                raise ValueError('Invalid duration format')
+            self.__itunes_duration = itunes_duration
+        return self.__itunes_duration
+
+    def itunes_explicit(self, itunes_explicit=None):
+        '''Get or the the itunes:explicit value of the podcast episode. This
+        tag should be used to indicate whether your podcast episode contains
+        explicit material. The three values for this tag are "yes", "no", and
+        "clean".
+
+        If you populate this tag with "yes", an "explicit" parental advisory
+        graphic will appear next to your podcast artwork on the iTunes Store
+        and in the Name column in iTunes. If the value is "clean", the parental
+        advisory type is considered Clean, meaning that no explicit language or
+        adult content is included anywhere in the episodes, and a "clean"
+        graphic will appear. If the explicit tag is present and has any other
+        value (e.g., "no"), you see no indicator — blank is the default
+        advisory type.
+
+        :param itunes_explicit: If the podcast episode contains explicit
+                                material.
+        :returns: If the podcast episode contains explicit material.
+        '''
+        if itunes_explicit is not None:
+            if itunes_explicit not in ('', 'yes', 'no', 'clean'):
+                raise ValueError('Invalid value for explicit tag')
+            self.__itunes_explicit = itunes_explicit
+        return self.__itunes_explicit
+
+    def itunes_is_closed_captioned(self, itunes_is_closed_captioned=None):
+        '''Get or set the is_closed_captioned value of the podcast episode.
+        This tag should be used if your podcast includes a video episode with
+        embedded closed captioning support. The two values for this tag are
+        "yes" and "no”.
+
+        :param is_closed_captioned: If the episode has closed captioning
+                                    support.
+        :returns: If the episode has closed captioning support.
+        '''
+        if itunes_is_closed_captioned is not None:
+            self.__itunes_is_closed_captioned = \
+                    itunes_is_closed_captioned in ('yes', True)
+        return self.__itunes_is_closed_captioned
+
+    def itunes_order(self, itunes_order=None):
+        '''Get or set the itunes:order value of the podcast episode. This tag
+        can be used to override the default ordering of episodes on the store.
+
+        This tag is used at an <item> level by populating with the number value
+        in which you would like the episode to appear on the store. For
+        example, if you would like an <item> to appear as the first episode in
+        the podcast, you would populate the <itunes:order> tag with “1”. If
+        conflicting order values are present in multiple episodes, the store
+        will use default ordering (pubDate).
+
+        To remove the order from the episode set the order to a value below
+        zero.
+
+        :param itunes_order: The order of the episode.
+        :returns: The order of the episode.
+        '''
+        if itunes_order is not None:
+            self.__itunes_order = int(itunes_order)
+        return self.__itunes_order
+
+    def itunes_subtitle(self, itunes_subtitle=None):
+        '''Get or set the itunes:subtitle value for the podcast episode. The
+        contents of this tag are shown in the Description column in iTunes. The
+        subtitle displays best if it is only a few words long.
+
+        :param itunes_subtitle: Subtitle of the podcast episode.
+        :returns: Subtitle of the podcast episode.
+        '''
+        if itunes_subtitle is not None:
+            self.__itunes_subtitle = itunes_subtitle
+        return self.__itunes_subtitle
+
+    def itunes_summary(self, itunes_summary=None):
+        '''Get or set the itunes:summary value for the podcast episode. The
+        contents of this tag are shown in a separate window that appears when
+        the "circled i" in the Description column is clicked. It also appears
+        on the iTunes page for your podcast. This field can be up to 4000
+        characters. If <itunes:summary> is not included, the contents of the
+        <description> tag are used.
+
+        :param itunes_summary: Summary of the podcast episode.
+        :returns: Summary of the podcast episode.
+        '''
+        if itunes_summary is not None:
+            self.__itunes_summary = itunes_summary
+        return self.__itunes_summary
+
+    def itunes_season(self, itunes_season=None):
+        '''Get or set the itunes:season value for the podcast episode.
+
+        :param itunes_season: Season number of the podcast epiosode.
+        :returns: Season number of the podcast episode.
+        '''
+        if itunes_season is not None:
+            self.__itunes_season = int(itunes_season)
+        return self.__itunes_season
+
+    def itunes_episode(self, itunes_episode=None):
+        '''Get or set the itunes:episode value for the podcast episode.
+
+        :param itunes_season: Episode number of the podcast epiosode.
+        :returns: Episode number of the podcast episode.
+        '''
+        if itunes_episode is not None:
+            self.__itunes_episode = int(itunes_episode)
+        return self.__itunes_episode
+
+    def itunes_title(self, itunes_title=None):
+        '''Get or set the itunes:title value for the podcast episode.
+
+        An episode title specific for Apple Podcasts. Don’t specify the episode
+        number or season number in this tag. Also, don’t repeat the title of
+        your show within your episode title.
+
+        :param itunes_title: Episode title specific for Apple Podcasts
+        :returns: Title specific for Apple Podcast
+        '''
+        if itunes_title is not None:
+            self.__itunes_title = itunes_title
+        return self.__itunes_title
+
+    def itunes_episode_type(self, itunes_episode_type=None):
+        '''Get or set the itunes:episodeType value of the item. This tag should
+        be used to indicate the episode type.
+        The three values for this tag are "full", "trailer" and "bonus".
+
+        If an episode is a trailer or bonus content, use this tag.
+
+        Specify full when you are submitting the complete content of your show.
+        Specify trailer when you are submitting a short, promotional piece of
+        content that represents a preview of your current show.
+        Specify bonus when you are submitting extra content for your show (for
+        example, behind the scenes information or interviews with the cast) or
+        cross-promotional content for another show.
+
+        :param itunes_episode_type: The episode type
+        :returns: type of the episode.
+        '''
+        if itunes_episode_type is not None:
+            if itunes_episode_type not in ('full', 'trailer', 'bonus'):
+                raise ValueError('Invalid value for episodeType tag')
+            self.__itunes_episode_type = itunes_episode_type
+        return self.__itunes_episode_type
diff --git a/feedgen/ext/syndication.py b/feedgen/ext/syndication.py
new file mode 100644
index 0000000..016b144
--- /dev/null
+++ b/feedgen/ext/syndication.py
@@ -0,0 +1,60 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright 2015 Kenichi Sato <ksato9700@gmail.com>
+#
+
+'''
+Extends FeedGenerator to support Syndication module
+
+See below for details
+http://web.resource.org/rss/1.0/modules/syndication/
+'''
+
+from feedgen.ext.base import BaseExtension
+from feedgen.util import xml_elem
+
+SYNDICATION_NS = 'http://purl.org/rss/1.0/modules/syndication/'
+PERIOD_TYPE = ('hourly', 'daily', 'weekly', 'monthly', 'yearly')
+
+
+def _set_value(channel, name, value):
+    if value:
+        newelem = xml_elem('{%s}' % SYNDICATION_NS + name, channel)
+        newelem.text = value
+
+
+class SyndicationExtension(BaseExtension):
+    def __init__(self):
+        self._update_period = None
+        self._update_freq = None
+        self._update_base = None
+
+    def extend_ns(self):
+        return {'sy': SYNDICATION_NS}
+
+    def extend_rss(self, rss_feed):
+        channel = rss_feed[0]
+        _set_value(channel, 'UpdatePeriod', self._update_period)
+        _set_value(channel, 'UpdateFrequency', str(self._update_freq))
+        _set_value(channel, 'UpdateBase', self._update_base)
+
+    def update_period(self, value):
+        if value not in PERIOD_TYPE:
+            raise ValueError('Invalid update period value')
+        self._update_period = value
+        return self._update_period
+
+    def update_frequency(self, value):
+        if type(value) is not int or value <= 0:
+            raise ValueError('Invalid update frequency value')
+        self._update_freq = value
+        return self._update_freq
+
+    def update_base(self, value):
+        # the value should be in W3CDTF format
+        self._update_base = value
+        return self._update_base
+
+
+class SyndicationEntryExtension(BaseExtension):
+    pass
diff --git a/feedgen/ext/torrent.py b/feedgen/ext/torrent.py
new file mode 100644
index 0000000..5548a81
--- /dev/null
+++ b/feedgen/ext/torrent.py
@@ -0,0 +1,126 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen.ext.torrent
+    ~~~~~~~~~~~~~~~~~~~
+
+    Extends the FeedGenerator to produce torrent feeds.
+
+    :copyright: 2016, Raspbeguy <raspbeguy@hashtagueule.fr>
+
+    :license: FreeBSD and LGPL, see license.* for more details.
+'''
+
+from feedgen.ext.base import BaseEntryExtension, BaseExtension
+from feedgen.util import xml_elem
+
+TORRENT_NS = 'http://xmlns.ezrss.it/0.1/dtd/'
+
+
+class TorrentExtension(BaseExtension):
+    '''FeedGenerator extension for torrent feeds.
+    '''
+    def extend_ns(self):
+        return {'torrent': TORRENT_NS}
+
+
+class TorrentEntryExtension(BaseEntryExtension):
+    '''FeedEntry extension for torrent feeds
+    '''
+    def __init__(self):
+        self.__torrent_filename = None
+        self.__torrent_infohash = None
+        self.__torrent_contentlength = None
+        self.__torrent_seeds = None
+        self.__torrent_peers = None
+        self.__torrent_verified = None
+
+    def extend_rss(self, entry):
+        '''Add additional fields to an RSS item.
+
+        :param feed: The RSS item XML element to use.
+        '''
+        if self.__torrent_filename:
+            filename = xml_elem('{%s}filename' % TORRENT_NS, entry)
+            filename.text = self.__torrent_filename
+
+        if self.__torrent_contentlength:
+            contentlength = xml_elem('{%s}contentlength' % TORRENT_NS, entry)
+            contentlength.text = self.__torrent_contentlength
+
+        if self.__torrent_infohash:
+            infohash = xml_elem('{%s}infohash' % TORRENT_NS, entry)
+            infohash.text = self.__torrent_infohash
+            magnet = xml_elem('{%s}magneturi' % TORRENT_NS, entry)
+            magnet.text = 'magnet:?xt=urn:btih:' + self.__torrent_infohash
+
+        if self.__torrent_seeds:
+            seeds = xml_elem('{%s}seed' % TORRENT_NS, entry)
+            seeds.text = self.__torrent_seeds
+
+        if self.__torrent_peers:
+            peers = xml_elem('{%s}peers' % TORRENT_NS, entry)
+            peers.text = self.__torrent_peers
+
+        if self.__torrent_verified:
+            verified = xml_elem('{%s}verified' % TORRENT_NS, entry)
+            verified.text = self.__torrent_verified
+
+    def filename(self, torrent_filename=None):
+        '''Get or set the name of the torrent file.
+
+        :param torrent_filename: The name of the torrent file.
+        :returns: The name of the torrent file.
+        '''
+        if torrent_filename is not None:
+            self.__torrent_filename = torrent_filename
+        return self.__torrent_filename
+
+    def infohash(self, torrent_infohash=None):
+        '''Get or set the hash of the target file.
+
+        :param torrent_infohash: The target file hash.
+        :returns: The target hash file.
+        '''
+        if torrent_infohash is not None:
+            self.__torrent_infohash = torrent_infohash
+        return self.__torrent_infohash
+
+    def contentlength(self, torrent_contentlength=None):
+        '''Get or set the size of the target file.
+
+        :param torrent_contentlength: The target file size.
+        :returns: The target file size.
+        '''
+        if torrent_contentlength is not None:
+            self.__torrent_contentlength = torrent_contentlength
+        return self.__torrent_contentlength
+
+    def seeds(self, torrent_seeds=None):
+        '''Get or set the number of seeds.
+
+        :param torrent_seeds: The seeds number.
+        :returns: The seeds number.
+        '''
+        if torrent_seeds is not None:
+            self.__torrent_seeds = torrent_seeds
+        return self.__torrent_seeds
+
+    def peers(self, torrent_peers=None):
+        '''Get or set the number od peers
+
+        :param torrent_infohash: The peers number.
+        :returns: The peers number.
+        '''
+        if torrent_peers is not None:
+            self.__torrent_peers = torrent_peers
+        return self.__torrent_peers
+
+    def verified(self, torrent_verified=None):
+        '''Get or set the number of verified peers.
+
+        :param torrent_infohash: The verified peers number.
+        :returns: The verified peers number.
+        '''
+        if torrent_verified is not None:
+            self.__torrent_verified = torrent_verified
+        return self.__torrent_verified
diff --git a/feedgen/feed.py b/feedgen/feed.py
new file mode 100644
index 0000000..0450304
--- /dev/null
+++ b/feedgen/feed.py
@@ -0,0 +1,1176 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen.feed
+    ~~~~~~~~~~~~
+
+    :copyright: 2013-2020, Lars Kiesow <lkiesow@uos.de>
+
+    :license: FreeBSD and LGPL, see license.* for more details.
+
+'''
+
+import sys
+from datetime import datetime
+
+import dateutil.parser
+import dateutil.tz
+from lxml import etree  # nosec - not using this for parsing
+
+import feedgen.version
+from feedgen.compat import string_types
+from feedgen.entry import FeedEntry
+from feedgen.util import ensure_format, formatRFC2822, xml_elem
+
+_feedgen_version = feedgen.version.version_str
+
+
+class FeedGenerator(object):
+    '''FeedGenerator for generating ATOM and RSS feeds.
+    '''
+
+    def __init__(self):
+        self.__feed_entries = []
+
+        # ATOM
+        # https://tools.ietf.org/html/rfc4287
+        # required
+        self.__atom_id = None
+        self.__atom_title = None
+        self.__atom_updated = datetime.now(dateutil.tz.tzutc())
+
+        # recommended
+        self.__atom_author = None  # {name*, uri, email}
+        self.__atom_link = None  # {href*, rel, type, hreflang, title, length}
+
+        # optional
+        self.__atom_category = None  # {term*, scheme, label}
+        self.__atom_contributor = None
+        self.__atom_generator = {
+                'value': 'python-feedgen',
+                'uri': 'https://lkiesow.github.io/python-feedgen',
+                'version': feedgen.version.version_str}  # {value*,uri,version}
+        self.__atom_icon = None
+        self.__atom_logo = None
+        self.__atom_rights = None
+        self.__atom_subtitle = None
+
+        # other
+        self.__atom_feed_xml_lang = None
+
+        # RSS
+        # http://www.rssboard.org/rss-specification
+        self.__rss_title = None
+        self.__rss_link = None
+        self.__rss_description = None
+
+        self.__rss_category = None
+        self.__rss_cloud = None
+        self.__rss_copyright = None
+        self.__rss_docs = 'http://www.rssboard.org/rss-specification'
+        self.__rss_generator = 'python-feedgen'
+        self.__rss_image = None
+        self.__rss_language = None
+        self.__rss_lastBuildDate = datetime.now(dateutil.tz.tzutc())
+        self.__rss_managingEditor = None
+        self.__rss_pubDate = None
+        self.__rss_rating = None
+        self.__rss_skipHours = None
+        self.__rss_skipDays = None
+        self.__rss_textInput = None
+        self.__rss_ttl = None
+        self.__rss_webMaster = None
+
+        # Extension list:
+        self.__extensions = {}
+
+    def _create_atom(self, extensions=True):
+        '''Create a ATOM feed xml structure containing all previously set
+        fields.
+
+        :returns: Tuple containing the feed root element and the element tree.
+        '''
+        nsmap = dict()
+        if extensions:
+            for ext in self.__extensions.values() or []:
+                if ext.get('atom'):
+                    nsmap.update(ext['inst'].extend_ns())
+
+        feed = xml_elem('feed',
+                        xmlns='http://www.w3.org/2005/Atom',
+                        nsmap=nsmap)
+        if self.__atom_feed_xml_lang:
+            feed.attrib['{http://www.w3.org/XML/1998/namespace}lang'] = \
+                    self.__atom_feed_xml_lang
+
+        if not (self.__atom_id and self.__atom_title and self.__atom_updated):
+            missing = ([] if self.__atom_title else ['title']) + \
+                      ([] if self.__atom_id else ['id']) + \
+                      ([] if self.__atom_updated else ['updated'])
+            missing = ', '.join(missing)
+            raise ValueError('Required fields not set (%s)' % missing)
+        id = xml_elem('id', feed)
+        id.text = self.__atom_id
+        title = xml_elem('title', feed)
+        title.text = self.__atom_title
+        updated = xml_elem('updated', feed)
+        updated.text = self.__atom_updated.isoformat()
+
+        # Add author elements
+        for a in self.__atom_author or []:
+            # Atom requires a name. Skip elements without.
+            if not a.get('name'):
+                continue
+            author = xml_elem('author', feed)
+            name = xml_elem('name', author)
+            name.text = a.get('name')
+            if a.get('email'):
+                email = xml_elem('email', author)
+                email.text = a.get('email')
+            if a.get('uri'):
+                uri = xml_elem('uri', author)
+                uri.text = a.get('uri')
+
+        for ln in self.__atom_link or []:
+            link = xml_elem('link', feed, href=ln['href'])
+            if ln.get('rel'):
+                link.attrib['rel'] = ln['rel']
+            if ln.get('type'):
+                link.attrib['type'] = ln['type']
+            if ln.get('hreflang'):
+                link.attrib['hreflang'] = ln['hreflang']
+            if ln.get('title'):
+                link.attrib['title'] = ln['title']
+            if ln.get('length'):
+                link.attrib['length'] = ln['length']
+
+        for c in self.__atom_category or []:
+            cat = xml_elem('category', feed, term=c['term'])
+            if c.get('scheme'):
+                cat.attrib['scheme'] = c['scheme']
+            if c.get('label'):
+                cat.attrib['label'] = c['label']
+
+        # Add author elements
+        for c in self.__atom_contributor or []:
+            # Atom requires a name. Skip elements without.
+            if not c.get('name'):
+                continue
+            contrib = xml_elem('contributor', feed)
+            name = xml_elem('name', contrib)
+            name.text = c.get('name')
+            if c.get('email'):
+                email = xml_elem('email', contrib)
+                email.text = c.get('email')
+            if c.get('uri'):
+                uri = xml_elem('uri', contrib)
+                uri.text = c.get('uri')
+
+        if self.__atom_generator and self.__atom_generator.get('value'):
+            generator = xml_elem('generator', feed)
+            generator.text = self.__atom_generator['value']
+            if self.__atom_generator.get('uri'):
+                generator.attrib['uri'] = self.__atom_generator['uri']
+            if self.__atom_generator.get('version'):
+                generator.attrib['version'] = self.__atom_generator['version']
+
+        if self.__atom_icon:
+            icon = xml_elem('icon', feed)
+            icon.text = self.__atom_icon
+
+        if self.__atom_logo:
+            logo = xml_elem('logo', feed)
+            logo.text = self.__atom_logo
+
+        if self.__atom_rights:
+            rights = xml_elem('rights', feed)
+            rights.text = self.__atom_rights
+
+        if self.__atom_subtitle:
+            subtitle = xml_elem('subtitle', feed)
+            subtitle.text = self.__atom_subtitle
+
+        if extensions:
+            for ext in self.__extensions.values() or []:
+                if ext.get('atom'):
+                    ext['inst'].extend_atom(feed)
+
+        for entry in self.__feed_entries:
+            entry = entry.atom_entry()
+            feed.append(entry)
+
+        doc = etree.ElementTree(feed)
+        return feed, doc
+
+    def atom_str(self, pretty=False, extensions=True, encoding='UTF-8',
+                 xml_declaration=True):
+        '''Generates an ATOM feed and returns the feed XML as string.
+
+        :param pretty: If the feed should be split into multiple lines and
+            properly indented.
+        :param extensions: Enable or disable the loaded extensions for the xml
+            generation (default: enabled).
+        :param encoding: Encoding used in the  XML file (default: UTF-8).
+        :param xml_declaration: If an XML declaration should be added to the
+            output (Default: enabled).
+        :returns: String representation of the ATOM feed.
+
+        **Return type:** The return type may vary between different Python
+        versions and your encoding parameters passed to this method. For
+        details have a look at the `lxml documentation
+        <https://docs.python.org/3/library/xml.etree.elementtree.html#xml.etree.ElementTree.tostring>`_
+        '''
+        feed, doc = self._create_atom(extensions=extensions)
+        return etree.tostring(doc, pretty_print=pretty, encoding=encoding,
+                              xml_declaration=xml_declaration)
+
+    def atom_file(self, filename, extensions=True, pretty=False,
+                  encoding='UTF-8', xml_declaration=True):
+        '''Generates an ATOM feed and write the resulting XML to a file.
+
+        :param filename: Name of file to write or a file-like object or a URL.
+        :param extensions: Enable or disable the loaded extensions for the xml
+            generation (default: enabled).
+        :param pretty: If the feed should be split into multiple lines and
+            properly indented.
+        :param encoding: Encoding used in the  XML file (default: UTF-8).
+        :param xml_declaration: If an XML declaration should be added to the
+            output (Default: enabled).
+        '''
+        feed, doc = self._create_atom(extensions=extensions)
+        doc.write(filename, pretty_print=pretty, encoding=encoding,
+                  xml_declaration=xml_declaration)
+
+    def _create_rss(self, extensions=True):
+        '''Create an RSS feed xml structure containing all previously set
+        fields.
+
+        :returns: Tuple containing the feed root element and the element tree.
+        '''
+        nsmap = dict()
+        if extensions:
+            for ext in self.__extensions.values() or []:
+                if ext.get('rss'):
+                    nsmap.update(ext['inst'].extend_ns())
+
+        nsmap.update({'atom':  'http://www.w3.org/2005/Atom',
+                      'content': 'http://purl.org/rss/1.0/modules/content/'})
+
+        feed = xml_elem('rss', version='2.0', nsmap=nsmap)
+        channel = xml_elem('channel', feed)
+        if not (self.__rss_title and
+                self.__rss_link and
+                self.__rss_description):
+            missing = ([] if self.__rss_title else ['title']) + \
+                      ([] if self.__rss_link else ['link']) + \
+                      ([] if self.__rss_description else ['description'])
+            missing = ', '.join(missing)
+            raise ValueError('Required fields not set (%s)' % missing)
+        title = xml_elem('title', channel)
+        title.text = self.__rss_title
+        link = xml_elem('link', channel)
+        link.text = self.__rss_link
+        desc = xml_elem('description', channel)
+        desc.text = self.__rss_description
+        for ln in self.__atom_link or []:
+            # It is recommended to include a atom self link in rss documents…
+            if ln.get('rel') == 'self':
+                selflink = xml_elem('{http://www.w3.org/2005/Atom}link',
+                                    channel, href=ln['href'], rel='self')
+                if ln.get('type'):
+                    selflink.attrib['type'] = ln['type']
+                if ln.get('hreflang'):
+                    selflink.attrib['hreflang'] = ln['hreflang']
+                if ln.get('title'):
+                    selflink.attrib['title'] = ln['title']
+                if ln.get('length'):
+                    selflink.attrib['length'] = ln['length']
+                break
+        if self.__rss_category:
+            for cat in self.__rss_category:
+                category = xml_elem('category', channel)
+                category.text = cat['value']
+                if cat.get('domain'):
+                    category.attrib['domain'] = cat['domain']
+        if self.__rss_cloud:
+            cloud = xml_elem('cloud', channel)
+            cloud.attrib['domain'] = self.__rss_cloud.get('domain')
+            cloud.attrib['port'] = self.__rss_cloud.get('port')
+            cloud.attrib['path'] = self.__rss_cloud.get('path')
+            cloud.attrib['registerProcedure'] = self.__rss_cloud.get(
+                    'registerProcedure')
+            cloud.attrib['protocol'] = self.__rss_cloud.get('protocol')
+        if self.__rss_copyright:
+            copyright = xml_elem('copyright', channel)
+            copyright.text = self.__rss_copyright
+        if self.__rss_docs:
+            docs = xml_elem('docs', channel)
+            docs.text = self.__rss_docs
+        if self.__rss_generator:
+            generator = xml_elem('generator', channel)
+            generator.text = self.__rss_generator
+        if self.__rss_image:
+            image = xml_elem('image', channel)
+            url = xml_elem('url', image)
+            url.text = self.__rss_image.get('url')
+            title = xml_elem('title', image)
+            title.text = self.__rss_image.get('title', self.__rss_title)
+            link = xml_elem('link', image)
+            link.text = self.__rss_image.get('link', self.__rss_link)
+            if self.__rss_image.get('width'):
+                width = xml_elem('width', image)
+                width.text = self.__rss_image.get('width')
+            if self.__rss_image.get('height'):
+                height = xml_elem('height', image)
+                height.text = self.__rss_image.get('height')
+            if self.__rss_image.get('description'):
+                description = xml_elem('description', image)
+                description.text = self.__rss_image.get('description')
+        if self.__rss_language:
+            language = xml_elem('language', channel)
+            language.text = self.__rss_language
+        if self.__rss_lastBuildDate:
+            lastBuildDate = xml_elem('lastBuildDate', channel)
+
+            lastBuildDate.text = formatRFC2822(self.__rss_lastBuildDate)
+        if self.__rss_managingEditor:
+            managingEditor = xml_elem('managingEditor', channel)
+            managingEditor.text = self.__rss_managingEditor
+        if self.__rss_pubDate:
+            pubDate = xml_elem('pubDate', channel)
+            pubDate.text = formatRFC2822(self.__rss_pubDate)
+        if self.__rss_rating:
+            rating = xml_elem('rating', channel)
+            rating.text = self.__rss_rating
+        if self.__rss_skipHours:
+            skipHours = xml_elem('skipHours', channel)
+            for h in self.__rss_skipHours:
+                hour = xml_elem('hour', skipHours)
+                hour.text = str(h)
+        if self.__rss_skipDays:
+            skipDays = xml_elem('skipDays', channel)
+            for d in self.__rss_skipDays:
+                day = xml_elem('day', skipDays)
+                day.text = d
+        if self.__rss_textInput:
+            textInput = xml_elem('textInput', channel)
+            textInput.attrib['title'] = self.__rss_textInput.get('title')
+            textInput.attrib['description'] = \
+                self.__rss_textInput.get('description')
+            textInput.attrib['name'] = self.__rss_textInput.get('name')
+            textInput.attrib['link'] = self.__rss_textInput.get('link')
+        if self.__rss_ttl:
+            ttl = xml_elem('ttl', channel)
+            ttl.text = str(self.__rss_ttl)
+        if self.__rss_webMaster:
+            webMaster = xml_elem('webMaster', channel)
+            webMaster.text = self.__rss_webMaster
+
+        if extensions:
+            for ext in self.__extensions.values() or []:
+                if ext.get('rss'):
+                    ext['inst'].extend_rss(feed)
+
+        for entry in self.__feed_entries:
+            item = entry.rss_entry()
+            channel.append(item)
+
+        doc = etree.ElementTree(feed)
+        return feed, doc
+
+    def rss_str(self, pretty=False, extensions=True, encoding='UTF-8',
+                xml_declaration=True):
+        '''Generates an RSS feed and returns the feed XML as string.
+
+        :param pretty: If the feed should be split into multiple lines and
+            properly indented.
+        :param extensions: Enable or disable the loaded extensions for the xml
+            generation (default: enabled).
+        :param encoding: Encoding used in the  XML file (default: UTF-8).
+        :param xml_declaration: If an XML declaration should be added to the
+            output (Default: enabled).
+        :returns: String representation of the RSS feed.
+
+        **Return type:** The return type may vary between different Python
+        versions and your encoding parameters passed to this method. For
+        details have a look at the `lxml documentation
+        <https://docs.python.org/3/library/xml.etree.elementtree.html#xml.etree.ElementTree.tostring>`_
+        '''
+        feed, doc = self._create_rss(extensions=extensions)
+        return etree.tostring(doc, pretty_print=pretty, encoding=encoding,
+                              xml_declaration=xml_declaration)
+
+    def rss_file(self, filename, extensions=True, pretty=False,
+                 encoding='UTF-8', xml_declaration=True):
+        '''Generates an RSS feed and write the resulting XML to a file.
+
+        :param filename: Name of file to write or a file-like object or a URL.
+        :param extensions: Enable or disable the loaded extensions for the xml
+            generation (default: enabled).
+        :param pretty: If the feed should be split into multiple lines and
+            properly indented.
+        :param encoding: Encoding used in the  XML file (default: UTF-8).
+        :param xml_declaration: If an XML declaration should be added to the
+            output (Default: enabled).
+        '''
+        feed, doc = self._create_rss(extensions=extensions)
+        doc.write(filename, pretty_print=pretty, encoding=encoding,
+                  xml_declaration=xml_declaration)
+
+    def title(self, title=None):
+        '''Get or set the title value of the feed. It should contain a human
+        readable title for the feed. Often the same as the title of the
+        associated website. Title is mandatory for both ATOM and RSS and should
+        not be blank.
+
+        :param title: The new title of the feed.
+        :returns: The feeds title.
+        '''
+        if title is not None:
+            self.__atom_title = title
+            self.__rss_title = title
+        return self.__atom_title
+
+    def id(self, id=None):
+        '''Get or set the feed id which identifies the feed using a universally
+        unique and permanent URI. If you have a long-term, renewable lease on
+        your Internet domain name, then you can feel free to use your website's
+        address. This field is for ATOM only. It is mandatory for ATOM.
+
+        :param id: New Id of the ATOM feed.
+        :returns: Id of the feed.
+        '''
+
+        if id is not None:
+            self.__atom_id = id
+        return self.__atom_id
+
+    def updated(self, updated=None):
+        '''Set or get the updated value which indicates the last time the feed
+        was modified in a significant way.
+
+        The value can either be a string which will automatically be parsed or
+        a datetime.datetime object. In any case it is necessary that the value
+        include timezone information.
+
+        This will set both atom:updated and rss:lastBuildDate.
+
+        Default value
+            If not set, updated has as value the current date and time.
+
+        :param updated: The modification date.
+        :returns: Modification date as datetime.datetime
+        '''
+        if updated is not None:
+            if isinstance(updated, string_types):
+                updated = dateutil.parser.parse(updated)
+            if not isinstance(updated, datetime):
+                raise ValueError('Invalid datetime format')
+            if updated.tzinfo is None:
+                raise ValueError('Datetime object has no timezone info')
+            self.__atom_updated = updated
+            self.__rss_lastBuildDate = updated
+
+        return self.__atom_updated
+
+    def lastBuildDate(self, lastBuildDate=None):
+        '''Set or get the lastBuildDate value which indicates the last time the
+        content of the channel changed.
+
+        The value can either be a string which will automatically be parsed or
+        a datetime.datetime object. In any case it is necessary that the value
+        include timezone information.
+
+        This will set both atom:updated and rss:lastBuildDate.
+
+        Default value
+            If not set, lastBuildDate has as value the current date and time.
+
+        :param lastBuildDate: The modification date.
+        :returns: Modification date as datetime.datetime
+        '''
+        return self.updated(lastBuildDate)
+
+    def author(self, author=None, replace=False, **kwargs):
+        '''Get or set author data. An author element is a dictionary containing
+        a name, an email address and a URI. Name is mandatory for ATOM, email
+        is mandatory for RSS.
+
+        This method can be called with:
+
+        - the fields of an author as keyword arguments
+        - the fields of an author as a dictionary
+        - a list of dictionaries containing the author fields
+
+        An author has the following fields:
+
+        - *name* conveys a human-readable name for the person.
+        - *uri* contains a home page for the person.
+        - *email* contains an email address for the person.
+
+        :param author:  Dictionary or list of dictionaries with author data.
+        :param replace: Add or replace old data.
+        :returns: List of authors as dictionaries.
+
+        Example::
+
+            >>> feedgen.author({'name':'John Doe', 'email':'jdoe@example.com'})
+            [{'name':'John Doe','email':'jdoe@example.com'}]
+
+            >>> feedgen.author([{'name':'Mr. X'},{'name':'Max'}])
+            [{'name':'John Doe','email':'jdoe@example.com'},
+                    {'name':'John Doe'}, {'name':'Max'}]
+
+            >>> feedgen.author(name='John Doe', email='jdoe@example.com',
+                               replace=True)
+            [{'name':'John Doe','email':'jdoe@example.com'}]
+
+        '''
+        if author is None and kwargs:
+            author = kwargs
+        if author is not None:
+            if replace or self.__atom_author is None:
+                self.__atom_author = []
+            self.__atom_author += ensure_format(author,
+                                                set(['name', 'email', 'uri']),
+                                                set(['name']))
+            self.__rss_author = []
+            for a in self.__atom_author:
+                if a.get('email'):
+                    self.__rss_author.append(a['email'])
+        return self.__atom_author
+
+    def link(self, link=None, replace=False, **kwargs):
+        '''Get or set link data. An link element is a dict with the fields
+        href, rel, type, hreflang, title, and length. Href is mandatory for
+        ATOM.
+
+        This method can be called with:
+
+        - the fields of a link as keyword arguments
+        - the fields of a link as a dictionary
+        - a list of dictionaries containing the link fields
+
+        A link has the following fields:
+
+        - *href* is the URI of the referenced resource (typically a Web page)
+        - *rel* contains a single link relationship type. It can be a full URI,
+          or one of the following predefined values (default=alternate):
+
+            - *alternate* an alternate representation of the entry or feed, for
+              example a permalink to the html version of the entry, or the
+              front page of the weblog.
+            - *enclosure* a related resource which is potentially large in size
+              and might require special handling, for example an audio or video
+              recording.
+            - *related* an document related to the entry or feed.
+            - *self* the feed itself.
+            - *via* the source of the information provided in the entry.
+
+        - *type* indicates the media type of the resource.
+        - *hreflang* indicates the language of the referenced resource.
+        - *title* human readable information about the link, typically for
+          display purposes.
+        - *length* the length of the resource, in bytes.
+
+        RSS only supports one link with URL only.
+
+        :param link:    Dict or list of dicts with data.
+        :param replace: If old links are to be replaced (default: False)
+        :returns:       Current set of link data
+
+        Example::
+
+            >>> feedgen.link( href='http://example.com/', rel='self')
+            [{'href':'http://example.com/', 'rel':'self'}]
+
+        '''
+        if link is None and kwargs:
+            link = kwargs
+        if link is not None:
+            if replace or self.__atom_link is None:
+                self.__atom_link = []
+            self.__atom_link += ensure_format(
+                link,
+                set(['href', 'rel', 'type', 'hreflang', 'title', 'length']),
+                set(['href']),
+                {'rel': [
+                    'about', 'alternate', 'appendix', 'archives', 'author',
+                    'bookmark', 'canonical', 'chapter', 'collection',
+                    'contents', 'copyright', 'create-form', 'current',
+                    'derivedfrom', 'describedby', 'describes', 'disclosure',
+                    'duplicate', 'edit', 'edit-form', 'edit-media',
+                    'enclosure', 'first', 'glossary', 'help', 'hosts', 'hub',
+                    'icon', 'index', 'item', 'last', 'latest-version',
+                    'license', 'lrdd', 'memento', 'monitor', 'monitor-group',
+                    'next', 'next-archive', 'nofollow', 'noreferrer',
+                    'original', 'payment', 'predecessor-version', 'prefetch',
+                    'prev', 'preview', 'previous', 'prev-archive',
+                    'privacy-policy', 'profile', 'related', 'replies',
+                    'search', 'section', 'self', 'service', 'start',
+                    'stylesheet', 'subsection', 'successor-version', 'tag',
+                    'terms-of-service', 'timegate', 'timemap', 'type', 'up',
+                    'version-history', 'via', 'working-copy', 'working-copy-of'
+                    ]})
+            # RSS only needs one URL. We use the first link for RSS:
+            if len(self.__atom_link) > 0:
+                self.__rss_link = self.__atom_link[-1]['href']
+        # return the set with more information (atom)
+        return self.__atom_link
+
+    def category(self, category=None, replace=False, **kwargs):
+        '''Get or set categories that the feed belongs to.
+
+        This method can be called with:
+
+        - the fields of a category as keyword arguments
+        - the fields of a category as a dictionary
+        - a list of dictionaries containing the category fields
+
+        A categories has the following fields:
+
+        - *term* identifies the category
+        - *scheme* identifies the categorization scheme via a URI.
+        - *label* provides a human-readable label for display
+
+        If a label is present it is used for the RSS feeds. Otherwise the term
+        is used. The scheme is used for the domain attribute in RSS.
+
+        :param category: Dict or list of dicts with data.
+        :param replace: Add or replace old data.
+        :returns: List of category data.
+        '''
+        if category is None and kwargs:
+            category = kwargs
+        if category is not None:
+            if replace or self.__atom_category is None:
+                self.__atom_category = []
+            self.__atom_category += ensure_format(
+                    category,
+                    set(['term', 'scheme', 'label']),
+                    set(['term']))
+            # Map the ATOM categories to RSS categories. Use the atom:label as
+            # name or if not present the atom:term. The atom:scheme is the
+            # rss:domain.
+            self.__rss_category = []
+            for cat in self.__atom_category:
+                rss_cat = {}
+                rss_cat['value'] = cat.get('label', cat['term'])
+                if cat.get('scheme'):
+                    rss_cat['domain'] = cat['scheme']
+                self.__rss_category.append(rss_cat)
+        return self.__atom_category
+
+    def cloud(self, domain=None, port=None, path=None, registerProcedure=None,
+              protocol=None):
+        '''Set or get the cloud data of the feed. It is an RSS only attribute.
+        It specifies a web service that supports the rssCloud interface which
+        can be implemented in HTTP-POST, XML-RPC or SOAP 1.1.
+
+        :param domain: The domain where the webservice can be found.
+        :param port: The port the webservice listens to.
+        :param path: The path of the webservice.
+        :param registerProcedure: The procedure to call.
+        :param protocol: Can be either HTTP-POST, XML-RPC or SOAP 1.1.
+        :returns: Dictionary containing the cloud data.
+        '''
+        if domain is not None:
+            self.__rss_cloud = {'domain': domain, 'port': port, 'path': path,
+                                'registerProcedure': registerProcedure,
+                                'protocol': protocol}
+        return self.__rss_cloud
+
+    def contributor(self, contributor=None, replace=False, **kwargs):
+        '''Get or set the contributor data of the feed. This is an ATOM only
+        value.
+
+        This method can be called with:
+        - the fields of an contributor as keyword arguments
+        - the fields of an contributor as a dictionary
+        - a list of dictionaries containing the contributor fields
+
+        An contributor has the following fields:
+        - *name* conveys a human-readable name for the person.
+        - *uri* contains a home page for the person.
+        - *email* contains an email address for the person.
+
+        :param contributor: Dictionary or list of dictionaries with contributor
+                            data.
+        :param replace: Add or replace old data.
+        :returns: List of contributors as dictionaries.
+        '''
+        if contributor is None and kwargs:
+            contributor = kwargs
+        if contributor is not None:
+            if replace or self.__atom_contributor is None:
+                self.__atom_contributor = []
+            self.__atom_contributor += ensure_format(
+                    contributor, set(['name', 'email', 'uri']), set(['name']))
+        return self.__atom_contributor
+
+    def generator(self, generator=None, version=None, uri=None):
+        '''Get or set the generator of the feed which identifies the software
+        used to generate the feed, for debugging and other purposes. Both the
+        uri and version attributes are optional and only available in the ATOM
+        feed.
+
+        :param generator: Software used to create the feed.
+        :param version: Version of the software.
+        :param uri: URI the software can be found.
+        '''
+        if generator is not None:
+            self.__atom_generator = {'value': generator}
+            if version is not None:
+                self.__atom_generator['version'] = version
+            if uri is not None:
+                self.__atom_generator['uri'] = uri
+            self.__rss_generator = generator
+        return self.__atom_generator
+
+    def icon(self, icon=None):
+        '''Get or set the icon of the feed which is a small image which
+        provides iconic visual identification for the feed. Icons should be
+        square. This is an ATOM only value.
+
+        :param icon: URI of the feeds icon.
+        :returns: URI of the feeds icon.
+        '''
+        if icon is not None:
+            self.__atom_icon = icon
+        return self.__atom_icon
+
+    def logo(self, logo=None):
+        '''Get or set the logo of the feed which is a larger image which
+        provides visual identification for the feed. Images should be twice as
+        wide as they are tall. This is an ATOM value but will also set the
+        rss:image value.
+
+        :param logo: Logo of the feed.
+        :returns: Logo of the feed.
+        '''
+        if logo is not None:
+            self.__atom_logo = logo
+            self.__rss_image = {'url': logo}
+        return self.__atom_logo
+
+    def image(self, url=None, title=None, link=None, width=None, height=None,
+              description=None):
+        '''Set the image of the feed. This element is roughly equivalent to
+        atom:logo.
+
+        :param url: The URL of a GIF, JPEG or PNG image.
+        :param title: Describes the image. The default value is the feeds
+                      title.
+        :param link: URL of the site the image will link to. The default is to
+                     use the feeds first alternate link.
+        :param width: Width of the image in pixel. The maximum is 144.
+        :param height: The height of the image. The maximum is 400.
+        :param description: Title of the link.
+        :returns: Data of the image as dictionary.
+        '''
+        if url is not None:
+            self.__rss_image = {'url': url}
+            if title is not None:
+                self.__rss_image['title'] = title
+            if link is not None:
+                self.__rss_image['link'] = link
+            if width:
+                self.__rss_image['width'] = width
+            if height:
+                self.__rss_image['height'] = height
+            self.__atom_logo = url
+        return self.__rss_image
+
+    def rights(self, rights=None):
+        '''Get or set the rights value of the feed which conveys information
+        about rights, e.g. copyrights, held in and over the feed. This ATOM
+        value will also set rss:copyright.
+
+        :param rights: Rights information of the feed.
+        '''
+        if rights is not None:
+            self.__atom_rights = rights
+            self.__rss_copyright = rights
+        return self.__atom_rights
+
+    def copyright(self, copyright=None):
+        '''Get or set the copyright notice for content in the channel. This RSS
+        value will also set the atom:rights value.
+
+        :param copyright: The copyright notice.
+        :returns: The copyright notice.
+        '''
+        return self.rights(copyright)
+
+    def subtitle(self, subtitle=None):
+        '''Get or set the subtitle value of the channel which contains a
+        human-readable description or subtitle for the feed. This ATOM property
+        will also set the value for rss:description.
+
+        :param subtitle: The subtitle of the feed.
+        :returns: The subtitle of the feed.
+        '''
+        if subtitle is not None:
+            self.__atom_subtitle = subtitle
+            self.__rss_description = subtitle
+        return self.__atom_subtitle
+
+    def description(self, description=None):
+        '''Set and get the description of the feed. This is an RSS only element
+        which is a phrase or sentence describing the channel. It is mandatory
+        for RSS feeds. It is roughly the same as atom:subtitle. Thus setting
+        this will also set atom:subtitle.
+
+        :param description: Description of the channel.
+        :returns: Description of the channel.
+
+        '''
+        return self.subtitle(description)
+
+    def docs(self, docs=None):
+        '''Get or set the docs value of the feed. This is an RSS only value. It
+        is a URL that points to the documentation for the format used in the
+        RSS file. It is probably a pointer to [1]. It is for people who might
+        stumble across an RSS file on a Web server 25 years from now and wonder
+        what it is.
+
+        [1]: http://www.rssboard.org/rss-specification
+
+        :param docs: URL of the format documentation.
+        :returns: URL of the format documentation.
+        '''
+        if docs is not None:
+            self.__rss_docs = docs
+        return self.__rss_docs
+
+    def language(self, language=None):
+        '''Get or set the language of the feed. It indicates the language the
+        channel is written in. This allows aggregators to group all Italian
+        language sites, for example, on a single page. This is an RSS only
+        field.  However, this value will also be used to set the xml:lang
+        property of the ATOM feed node.
+        The value should be an IETF language tag.
+
+        :param language: Language of the feed.
+        :returns: Language of the feed.
+        '''
+        if language is not None:
+            self.__rss_language = language
+            self.__atom_feed_xml_lang = language
+        return self.__rss_language
+
+    def managingEditor(self, managingEditor=None):
+        '''Set or get the value for managingEditor which is the email address
+        for person responsible for editorial content.    This is a RSS only
+        value.
+
+        :param managingEditor: Email address of the managing editor.
+        :returns: Email address of the managing editor.
+        '''
+        if managingEditor is not None:
+            self.__rss_managingEditor = managingEditor
+        return self.__rss_managingEditor
+
+    def pubDate(self, pubDate=None):
+        '''Set or get the publication date for the content in the channel. For
+        example, the New York Times publishes on a daily basis, the publication
+        date flips once every 24 hours. That's when the pubDate of the channel
+        changes.
+
+        The value can either be a string which will automatically be parsed or
+        a datetime.datetime object. In any case it is necessary that the value
+        include timezone information.
+
+        This will set both atom:updated and rss:lastBuildDate.
+
+        :param pubDate: The publication date.
+        :returns: Publication date as datetime.datetime
+        '''
+        if pubDate is not None:
+            if isinstance(pubDate, string_types):
+                pubDate = dateutil.parser.parse(pubDate)
+            if not isinstance(pubDate, datetime):
+                raise ValueError('Invalid datetime format')
+            if pubDate.tzinfo is None:
+                raise ValueError('Datetime object has no timezone info')
+            self.__rss_pubDate = pubDate
+
+        return self.__rss_pubDate
+
+    def rating(self, rating=None):
+        '''Set and get the PICS rating for the channel.    It is an RSS only
+        value.
+        '''
+        if rating is not None:
+            self.__rss_rating = rating
+        return self.__rss_rating
+
+    def skipHours(self, hours=None, replace=False):
+        '''Set or get the value of skipHours, a hint for aggregators telling
+        them which hours they can skip. This is an RSS only value.
+
+        This method can be called with an hour or a list of hours. The hours
+        are represented as integer values from 0 to 23.
+
+        :param hours: List of hours the feedreaders should not check the feed.
+        :param replace: Add or replace old data.
+        :returns: List of hours the feedreaders should not check the feed.
+        '''
+        if hours is not None:
+            if not (isinstance(hours, list) or isinstance(hours, set)):
+                hours = [hours]
+            for h in hours:
+                if h not in range(24):
+                    raise ValueError('Invalid hour %s' % h)
+            if replace or not self.__rss_skipHours:
+                self.__rss_skipHours = set()
+            self.__rss_skipHours |= set(hours)
+        return self.__rss_skipHours
+
+    def skipDays(self, days=None, replace=False):
+        '''Set or get the value of skipDays, a hint for aggregators telling
+        them which days they can skip This is an RSS only value.
+
+        This method can be called with a day name or a list of day names. The
+        days are represented as strings from 'Monday' to 'Sunday'.
+
+        :param hours:   List of days the feedreaders should not check the feed.
+        :param replace: Add or replace old data.
+        :returns:       List of days the feedreaders should not check the feed.
+        '''
+        if days is not None:
+            if not (isinstance(days, list) or isinstance(days, set)):
+                days = [days]
+            for d in days:
+                if d not in ['Monday', 'Tuesday', 'Wednesday', 'Thursday',
+                             'Friday', 'Saturday', 'Sunday']:
+                    raise ValueError('Invalid day %s' % d)
+            if replace or not self.__rss_skipDays:
+                self.__rss_skipDays = set()
+            self.__rss_skipDays |= set(days)
+        return self.__rss_skipDays
+
+    def textInput(self, title=None, description=None, name=None, link=None):
+        '''Get or set the value of textInput. This is an RSS only field.  The
+        purpose of the <textInput> element is something of a mystery. You can
+        use it to specify a search engine box. Or to allow a reader to provide
+        feedback. Most aggregators ignore it.
+
+        :param title: The label of the Submit button in the text input area.
+        :param description: Explains the text input area.
+        :param name: The name of the text object in the text input area.
+        :param link: The URL of the CGI script that processes text input
+                     requests.
+        :returns: Dictionary containing textInput values.
+        '''
+        if title is not None:
+            self.__rss_textInput = {}
+            self.__rss_textInput['title'] = title
+            self.__rss_textInput['description'] = description
+            self.__rss_textInput['name'] = name
+            self.__rss_textInput['link'] = link
+        return self.__rss_textInput
+
+    def ttl(self, ttl=None):
+        '''Get or set the ttl value. It is an RSS only element. ttl stands for
+        time to live. It's a number of minutes that indicates how long a
+        channel can be cached before refreshing from the source.
+
+        :param ttl: Integer value indicating how long the channel may be
+                    cached.
+        :returns: Time to live.
+        '''
+        if ttl is not None:
+            self.__rss_ttl = int(ttl)
+        return self.__rss_ttl
+
+    def webMaster(self, webMaster=None):
+        '''Get and set the value of webMaster, which represents the email
+        address for the person responsible for technical issues relating to the
+        feed.  This is an RSS only value.
+
+        :param webMaster: Email address of the webmaster.
+        :returns: Email address of the webmaster.
+        '''
+        if webMaster is not None:
+            self.__rss_webMaster = webMaster
+        return self.__rss_webMaster
+
+    def add_entry(self, feedEntry=None, order='prepend'):
+        '''This method will add a new entry to the feed. If the feedEntry
+        argument is omitted a new Entry object is created automatically. This
+        is the preferred way to add new entries to a feed.
+
+        :param feedEntry: FeedEntry object to add.
+        :param order: If `prepend` is chosen, the entry will be inserted
+                      at the beginning of the feed. If `append` is chosen,
+                      the entry will be appended to the feed.
+                      (default: `prepend`).
+        :returns: FeedEntry object created or passed to this function.
+
+        Example::
+
+            ...
+            >>> entry = feedgen.add_entry()
+            >>> entry.title('First feed entry')
+
+        '''
+        if feedEntry is None:
+            feedEntry = FeedEntry()
+
+        version = sys.version_info[0]
+
+        if version == 2:
+            items = self.__extensions.iteritems()
+        else:
+            items = self.__extensions.items()
+
+        # Try to load extensions:
+        for extname, ext in items:
+            try:
+                feedEntry.register_extension(extname,
+                                             ext['extension_class_entry'],
+                                             ext['atom'],
+                                             ext['rss'])
+            except ImportError:
+                pass
+
+        if order == 'prepend':
+            self.__feed_entries.insert(0, feedEntry)
+        else:
+            self.__feed_entries.append(feedEntry)
+        return feedEntry
+
+    def add_item(self, item=None):
+        '''This method will add a new item to the feed. If the item argument is
+        omitted a new FeedEntry object is created automatically. This is just
+        another name for add_entry(...)
+        '''
+        return self.add_entry(item)
+
+    def entry(self, entry=None, replace=False):
+        '''Get or set feed entries. Use the add_entry() method instead to
+        automatically create the FeedEntry objects.
+
+        This method takes both a single FeedEntry object or a list of objects.
+
+        :param entry: FeedEntry object or list of FeedEntry objects.
+        :returns: List ob all feed entries.
+        '''
+        if entry is not None:
+            if not isinstance(entry, list):
+                entry = [entry]
+            if replace:
+                self.__feed_entries = []
+
+            version = sys.version_info[0]
+
+            if version == 2:
+                items = self.__extensions.iteritems()
+            else:
+                items = self.__extensions.items()
+
+            # Try to load extensions:
+            for e in entry:
+                for extname, ext in items:
+                    try:
+                        e.register_extension(extname,
+                                             ext['extension_class_entry'],
+                                             ext['atom'], ext['rss'])
+                    except ImportError:
+                        pass
+
+            self.__feed_entries += entry
+        return self.__feed_entries
+
+    def item(self, item=None, replace=False):
+        '''Get or set feed items. This is just another name for entry(...)
+        '''
+        return self.entry(item, replace)
+
+    def remove_entry(self, entry):
+        '''Remove a single entry from the feed. This method accepts both the
+        FeedEntry object to remove or the index of the entry as argument.
+
+        :param entry: Entry or index of entry to remove.
+        '''
+        if isinstance(entry, FeedEntry):
+            self.__feed_entries.remove(entry)
+        else:
+            self.__feed_entries.pop(entry)
+
+    def remove_item(self, item):
+        '''Remove a single item from the feed. This is another name for
+        remove_entry.
+        '''
+        self.remove_entry(item)
+
+    def load_extension(self, name, atom=True, rss=True):
+        '''Load a specific extension by name.
+
+        :param name: Name of the extension to load.
+        :param atom: If the extension should be used for ATOM feeds.
+        :param rss: If the extension should be used for RSS feeds.
+        '''
+        # Check loaded extensions
+        if not isinstance(self.__extensions, dict):
+            self.__extensions = {}
+        if name in self.__extensions.keys():
+            raise ImportError('Extension already loaded')
+
+        # Load extension
+        extname = name[0].upper() + name[1:]
+        feedsupmod = __import__('feedgen.ext.%s' % name)
+        feedextmod = getattr(feedsupmod.ext, name)
+        try:
+            entrysupmod = __import__('feedgen.ext.%s_entry' % name)
+            entryextmod = getattr(entrysupmod.ext, name + '_entry')
+        except ImportError:
+            # Use FeedExtension module instead
+            entrysupmod = feedsupmod
+            entryextmod = feedextmod
+        feedext = getattr(feedextmod, extname + 'Extension')
+        try:
+            entryext = getattr(entryextmod, extname + 'EntryExtension')
+        except AttributeError:
+            entryext = None
+        self.register_extension(name, feedext, entryext, atom, rss)
+
+    def register_extension(self, namespace, extension_class_feed=None,
+                           extension_class_entry=None, atom=True, rss=True):
+        '''Registers an extension by class.
+
+        :param namespace: namespace for the extension
+        :param extension_class_feed: Class of the feed extension to load.
+        :param extension_class_entry: Class of the entry extension to load
+        :param atom: If the extension should be used for ATOM feeds.
+        :param rss: If the extension should be used for RSS feeds.
+        '''
+        # Check loaded extensions
+        # `load_extension` ignores the "Extension" suffix.
+        if not isinstance(self.__extensions, dict):
+            self.__extensions = {}
+        if namespace in self.__extensions.keys():
+            raise ImportError('Extension already loaded')
+
+        # Load extension
+        extinst = extension_class_feed()
+        setattr(self, namespace, extinst)
+
+        # `load_extension` registry
+        self.__extensions[namespace] = {
+                'inst': extinst,
+                'extension_class_feed': extension_class_feed,
+                'extension_class_entry': extension_class_entry,
+                'atom': atom,
+                'rss': rss
+                }
+
+        # Try to load the extension for already existing entries:
+        for entry in self.__feed_entries:
+            try:
+                entry.register_extension(namespace,
+                                         extension_class_entry,
+                                         atom,
+                                         rss)
+            except ImportError:
+                pass
diff --git a/feedgen/util.py b/feedgen/util.py
new file mode 100644
index 0000000..18c1c0e
--- /dev/null
+++ b/feedgen/util.py
@@ -0,0 +1,96 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen.util
+    ~~~~~~~~~~~~
+
+    This file contains helper functions for the feed generator module.
+
+    :copyright: 2013, Lars Kiesow <lkiesow@uos.de>
+    :license: FreeBSD and LGPL, see license.* for more details.
+'''
+import locale
+import sys
+import lxml  # nosec - we configure a safe parser below
+
+# Configure a safe parser which does not allow XML entity expansion
+parser = lxml.etree.XMLParser(
+        attribute_defaults=False,
+        dtd_validation=False,
+        load_dtd=False,
+        no_network=True,
+        recover=False,
+        remove_pis=True,
+        resolve_entities=False,
+        huge_tree=False)
+
+
+def xml_fromstring(xmlstring):
+    return lxml.etree.fromstring(xmlstring, parser)  # nosec - safe parser
+
+
+def xml_elem(name, parent=None, **kwargs):
+    if parent is not None:
+        return lxml.etree.SubElement(parent, name, **kwargs)
+    return lxml.etree.Element(name, **kwargs)
+
+
+def ensure_format(val, allowed, required, allowed_values=None, defaults=None):
+    '''Takes a dictionary or a list of dictionaries and check if all keys are
+    in the set of allowed keys, if all required keys are present and if the
+    values of a specific key are ok.
+
+    :param val:            Dictionaries to check.
+    :param allowed:        Set of allowed keys.
+    :param required:       Set of required keys.
+    :param allowed_values: Dictionary with keys and sets of their allowed
+                           values.
+    :param defaults:       Dictionary with default values.
+    :returns:              List of checked dictionaries.
+    '''
+    if not val:
+        return []
+    if allowed_values is None:
+        allowed_values = {}
+    if defaults is None:
+        defaults = {}
+    # Make sure that we have a list of dicts. Even if there is only one.
+    if not isinstance(val, list):
+        val = [val]
+    for elem in val:
+        if not isinstance(elem, dict):
+            raise ValueError('Invalid data (value is no dictionary)')
+        # Set default values
+
+        version = sys.version_info[0]
+
+        if version == 2:
+            items = defaults.iteritems()
+        else:
+            items = defaults.items()
+
+        for k, v in items:
+            elem[k] = elem.get(k, v)
+        if not set(elem.keys()) <= allowed:
+            raise ValueError('Data contains invalid keys')
+        if not set(elem.keys()) >= required:
+            raise ValueError('Data contains not all required keys')
+
+        if version == 2:
+            values = allowed_values.iteritems()
+        else:
+            values = allowed_values.items()
+
+        for k, v in values:
+            if elem.get(k) and not elem[k] in v:
+                raise ValueError('Invalid value for %s' % k)
+    return val
+
+
+def formatRFC2822(date):
+    '''Make sure the locale setting do not interfere with the time format.
+    '''
+    old = locale.setlocale(locale.LC_ALL)
+    locale.setlocale(locale.LC_ALL, 'C')
+    date = date.strftime('%a, %d %b %Y %H:%M:%S %z')
+    locale.setlocale(locale.LC_ALL, old)
+    return date
diff --git a/feedgen/version.py b/feedgen/version.py
new file mode 100644
index 0000000..c8f76bf
--- /dev/null
+++ b/feedgen/version.py
@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+'''
+    feedgen.version
+    ~~~~~~~~~~~~~~~
+
+    :copyright: 2013-2018, Lars Kiesow <lkiesow@uos.de>
+
+    :license: FreeBSD and LGPL, see license.* for more details.
+
+'''
+
+'Version of python-feedgen represented as tuple'
+version = (1, 0, 0)
+
+
+'Version of python-feedgen represented as string'
+version_str = '.'.join([str(x) for x in version])
+
+version_major = version[:1]
+version_minor = version[:2]
+version_full = version
+
+version_major_str = '.'.join([str(x) for x in version_major])
+version_minor_str = '.'.join([str(x) for x in version_minor])
+version_full_str = '.'.join([str(x) for x in version_full])
diff --git a/license.bsd b/license.bsd
new file mode 100644
index 0000000..beac4ea
--- /dev/null
+++ b/license.bsd
@@ -0,0 +1,25 @@
+BSD 2-Clause License

+

+Copyright 2011, Lars Kiesow <lkiesow@uos.de>

+All rights reserved.

+

+Redistribution and use in source and binary forms, with or without

+modification, are permitted provided that the following conditions are met:

+

+1. Redistributions of source code must retain the above copyright notice, this

+   list of conditions and the following disclaimer.

+

+2. Redistributions in binary form must reproduce the above copyright notice,

+   this list of conditions and the following disclaimer in the documentation

+   and/or other materials provided with the distribution.

+

+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

diff --git a/license.lgpl b/license.lgpl
new file mode 100644
index 0000000..65c5ca8
--- /dev/null
+++ b/license.lgpl
@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
diff --git a/python-feedgen.spec b/python-feedgen.spec
new file mode 100644
index 0000000..a137396
--- /dev/null
+++ b/python-feedgen.spec
@@ -0,0 +1,67 @@
+%global pypi_name feedgen
+%global pypi_version 1.0.0
+
+Name:           python-%{pypi_name}
+Version:        %{pypi_version}
+Release:        1%{?dist}
+Summary:        Feed Generator (ATOM, RSS, Podcasts)
+
+License:        BSD or LGPLv3
+URL:            http://lkiesow.github.io/python-feedgen
+#Source0:        https://github.com/lkiesow/%{name}/archive/v%{version}.tar.gz
+Source0:        %{pypi_source}
+BuildArch:      noarch
+
+BuildRequires:  python3-devel
+BuildRequires:  python3dist(setuptools)
+BuildRequires:  python3dist(lxml)
+BuildRequires:  python3dist(python-dateutil)
+
+%description
+Feedgenerator: This module can be used to generate web feeds in both ATOM and
+RSS format. It has support for extensions. Included is for example an extension
+to produce Podcasts.
+
+%package -n     python3-%{pypi_name}
+Summary:        %{summary}
+%{?python_provide:%python_provide python3-%{pypi_name}}
+
+Requires:       python3dist(python-dateutil)
+Requires:       python3dist(lxml)
+
+%description -n python3-%{pypi_name}
+Feedgenerator: This module can be used to generate web feeds in both ATOM and
+RSS format. It has support for extensions. Included is for example an extension
+to produce Podcasts.
+
+
+%prep
+%autosetup -n %{pypi_name}-%{pypi_version}
+# Remove bundled egg-info
+rm -rf %{pypi_name}.egg-info
+
+%build
+%py3_build
+
+%install
+%py3_install
+
+%check
+%{__python3} setup.py test
+
+%files -n python3-%{pypi_name}
+%license license.lgpl license.bsd
+%doc readme.rst
+%{python3_sitelib}/%{pypi_name}
+%{python3_sitelib}/%{pypi_name}-%{version}-py?.?.egg-info
+
+%changelog
+* Mon Dec 25 2023 Lars Kiesow <lkiesow@uos.de> - 1.0.0-1
+- Update to 1.0.0
+- Removing support for Python 2
+
+* Sat May 19 2018 Lars Kiesow <lkiesow@uos.de> - 0.7.0-1
+- Update to 0.7.0
+
+* Tue Oct 24 2017 Lumir Balhar <lbalhar@redhat.com> - 0.6.1-1
+- Initial package.
diff --git a/readme.rst b/readme.rst
new file mode 100644
index 0000000..3edeaff
--- /dev/null
+++ b/readme.rst
@@ -0,0 +1,184 @@
+=============
+Feedgenerator
+=============
+
+This module can be used to generate web feeds in both ATOM and RSS format. It
+has support for extensions. Included is for example an extension to produce
+Podcasts.
+
+It is licensed under the terms of both, the FreeBSD license and the LGPLv3+.
+Choose the one which is more convenient for you. For more details have a look
+at license.bsd and license.lgpl.
+
+More details about the project:
+
+- `Repository <https://github.com/lkiesow/python-feedgen>`_
+- `Documentation <https://lkiesow.github.io/python-feedgen/>`_
+- `Python Package Index <https://pypi.python.org/pypi/feedgen/>`_
+
+
+------------
+Installation
+------------
+
+**Prebuild packages**
+
+If your distribution includes this project as package, like Fedora Linux does,
+you can simply use your package manager to install the package. For example::
+
+    $ dnf install python3-feedgen
+
+
+**Using pip**
+
+You can also use pip to install the feedgen module. Simply run::
+
+    $ pip install feedgen
+
+
+-------------
+Create a Feed
+-------------
+
+To create a feed simply instantiate the FeedGenerator class and insert some
+data:
+
+.. code-block:: python
+
+    from feedgen.feed import FeedGenerator
+    fg = FeedGenerator()
+    fg.id('http://lernfunk.de/media/654321')
+    fg.title('Some Testfeed')
+    fg.author( {'name':'John Doe','email':'john@example.de'} )
+    fg.link( href='http://example.com', rel='alternate' )
+    fg.logo('http://ex.com/logo.jpg')
+    fg.subtitle('This is a cool feed!')
+    fg.link( href='http://larskiesow.de/test.atom', rel='self' )
+    fg.language('en')
+
+Note that for the methods which set fields that can occur more than once in a
+feed you can use all of the following ways to provide data:
+
+- Provide the data for that element as keyword arguments
+- Provide the data for that element as dictionary
+- Provide a list of dictionaries with the data for several elements
+
+Example:
+
+.. code-block:: python
+
+    fg.contributor( name='John Doe', email='jdoe@example.com' )
+    fg.contributor({'name':'John Doe', 'email':'jdoe@example.com'})
+    fg.contributor([{'name':'John Doe', 'email':'jdoe@example.com'}, ...])
+
+-----------------
+Generate the Feed
+-----------------
+
+After that you can generate both RSS or ATOM by calling the respective method:
+
+.. code-block:: python
+
+    atomfeed = fg.atom_str(pretty=True) # Get the ATOM feed as string
+    rssfeed  = fg.rss_str(pretty=True) # Get the RSS feed as string
+    fg.atom_file('atom.xml') # Write the ATOM feed to a file
+    fg.rss_file('rss.xml') # Write the RSS feed to a file
+
+
+----------------
+Add Feed Entries
+----------------
+
+To add entries (items) to a feed you need to create new FeedEntry objects and
+append them to the list of entries in the FeedGenerator. The most convenient
+way to go is to use the FeedGenerator itself for the instantiation of the
+FeedEntry object:
+
+.. code-block:: python
+
+    fe = fg.add_entry()
+    fe.id('http://lernfunk.de/media/654321/1')
+    fe.title('The First Episode')
+    fe.link(href="http://lernfunk.de/feed")
+
+The FeedGenerator's method `add_entry(...)` will generate a new FeedEntry
+object, automatically append it to the feeds internal list of entries and
+return it, so that additional data can be added.
+
+----------
+Extensions
+----------
+
+The FeedGenerator supports extensions to include additional data into the XML
+structure of the feeds. Extensions can be loaded like this:
+
+.. code-block:: python
+
+    fg.load_extension('someext', atom=True, rss=True)
+
+This example would try to load the extension “someext” from the file
+`ext/someext.py`.  It is required that `someext.py` contains a class named
+“SomextExtension” which is required to have at least the two methods
+`extend_rss(...)` and `extend_atom(...)`. Although not required, it is strongly
+suggested to use `BaseExtension` from `ext/base.py` as superclass.
+
+`load_extension('someext', ...)` will also try to load a class named
+“SomextEntryExtension” for every entry of the feed. This class can be located
+either in the same file as SomextExtension or in `ext/someext_entry.py` which
+is suggested especially for large extensions.
+
+The parameters `atom` and `rss` control if the extension is used for ATOM and
+RSS feeds respectively. The default value for both parameters is `True`,
+meaning the extension is used for both kinds of feeds.
+
+**Example: Producing a Podcast**
+
+One extension already provided is the podcast extension. A podcast is an RSS
+feed with some additional elements for ITunes.
+
+To produce a podcast simply load the `podcast` extension:
+
+.. code-block:: python
+
+    from feedgen.feed import FeedGenerator
+    fg = FeedGenerator()
+    fg.load_extension('podcast')
+    ...
+    fg.podcast.itunes_category('Technology', 'Podcasting')
+    ...
+    fe = fg.add_entry()
+    fe.id('http://lernfunk.de/media/654321/1/file.mp3')
+    fe.title('The First Episode')
+    fe.description('Enjoy our first episode.')
+    fe.enclosure('http://lernfunk.de/media/654321/1/file.mp3', 0, 'audio/mpeg')
+    ...
+    fg.rss_str(pretty=True)
+    fg.rss_file('podcast.xml')
+
+If the FeedGenerator class is used to load an extension, it is automatically
+loaded for every feed entry as well.  You can, however, load an extension for a
+specific FeedEntry only by calling `load_extension(...)` on that entry.
+
+Even if extensions are loaded, they can be temporarily disabled during the feed
+generation by calling the generating method with the keyword argument
+`extensions` set to `False`.
+
+**Custom Extensions**
+
+If you want to load custom extensions which are not part of the feedgen
+package, you can use the method `register_extension` instead. You can directly
+pass the classes for the feed and the entry extension to this method meaning
+that you can define them everywhere.
+
+
+---------------------
+Testing the Generator
+---------------------
+
+You can test the module by simply executing::
+
+    $ python -m feedgen
+
+If you want to have a look at the code for this test to have a working code
+example for a whole feed generation process, you can find it in the
+`__main__.py <https://github.com/lkiesow/python-feedgen/blob/master/feedgen/__main__.py>`_.
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..631c4c2
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+lxml>=4.2.5
+python_dateutil>=2.8.0
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000..3c6e79c
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,2 @@
+[bdist_wheel]
+universal=1
diff --git a/setup.py b/setup.py
new file mode 100755
index 0000000..a5e2021
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,51 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from setuptools import setup
+
+import feedgen.version
+
+packages = ['feedgen', 'feedgen/ext']
+
+setup(name='feedgen',
+      packages=packages,
+      version=feedgen.version.version_full_str,
+      description='Feed Generator (ATOM, RSS, Podcasts)',
+      author='Lars Kiesow',
+      author_email='lkiesow@uos.de',
+      url='https://lkiesow.github.io/python-feedgen',
+      keywords=['feed', 'ATOM', 'RSS', 'podcast'],
+      license='FreeBSD and LGPLv3+',
+      install_requires=['lxml', 'python-dateutil'],
+      classifiers=[
+        'Development Status :: 5 - Production/Stable',
+        'Intended Audience :: Developers',
+        'Intended Audience :: Information Technology',
+        'Intended Audience :: Science/Research',
+        'License :: OSI Approved :: BSD License',
+        'License :: OSI Approved :: GNU Lesser General Public License v3 ' +
+        'or later (LGPLv3+)',
+        'Natural Language :: English',
+        'Operating System :: OS Independent',
+        'Programming Language :: Python',
+        'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 3',
+        'Topic :: Communications',
+        'Topic :: Internet',
+        'Topic :: Text Processing',
+        'Topic :: Text Processing :: Markup',
+        'Topic :: Text Processing :: Markup :: XML'
+        ],
+      test_suite="tests",
+      long_description='''\
+Feedgenerator
+=============
+
+This module can be used to generate web feeds in both ATOM and RSS format. It
+has support for extensions. Included is for example an extension to produce
+Podcasts.
+
+It is licensed under the terms of both, the FreeBSD license and the LGPLv3+.
+Choose the one which is more convenient for you. For more details have a look
+at license.bsd and license.lgpl.
+''')
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/__init__.py
diff --git a/tests/test_entry.py b/tests/test_entry.py
new file mode 100644
index 0000000..adfd8b5
--- /dev/null
+++ b/tests/test_entry.py
@@ -0,0 +1,180 @@
+# -*- coding: utf-8 -*-
+
+"""
+Tests for a basic entry
+
+These are test cases for a basic entry.
+"""
+
+import unittest
+
+from feedgen.feed import FeedGenerator
+
+
+class TestSequenceFunctions(unittest.TestCase):
+
+    def setUp(self):
+        fg = FeedGenerator()
+        self.feedId = 'http://example.com'
+        self.title = 'Some Testfeed'
+
+        fg.id(self.feedId)
+        fg.title(self.title)
+        fg.link(href='http://lkiesow.de', rel='alternate')[0]
+        fg.description('...')
+
+        fe = fg.add_entry()
+        fe.id('http://lernfunk.de/media/654321/1')
+        fe.title('The First Episode')
+        fe.content(u'…')
+
+        # Use also the different name add_item
+        fe = fg.add_item()
+        fe.id('http://lernfunk.de/media/654321/1')
+        fe.title('The Second Episode')
+        fe.content(u'…')
+
+        fe = fg.add_entry()
+        fe.id('http://lernfunk.de/media/654321/1')
+        fe.title('The Third Episode')
+        fe.content(u'…')
+
+        self.fg = fg
+
+    def test_setEntries(self):
+        fg2 = FeedGenerator()
+        fg2.entry(self.fg.entry())
+        self.assertEqual(len(fg2.entry()), 3)
+        self.assertEqual(self.fg.entry(), fg2.entry())
+
+    def test_loadExtension(self):
+        fe = self.fg.add_item()
+        fe.id('1')
+        fe.title(u'…')
+        fe.content(u'…')
+        fe.load_extension('base')
+        self.assertTrue(fe.base)
+        self.assertTrue(self.fg.atom_str())
+
+    def test_checkEntryNumbers(self):
+        fg = self.fg
+        self.assertEqual(len(fg.entry()), 3)
+
+    def test_TestEntryItems(self):
+        fe = self.fg.add_item()
+        fe.title('qwe')
+        self.assertEqual(fe.title(), 'qwe')
+        author = fe.author(email='ldoe@example.com')[0]
+        self.assertFalse(author.get('name'))
+        self.assertEqual(author.get('email'), 'ldoe@example.com')
+        author = fe.author(name='John Doe', email='jdoe@example.com',
+                           replace=True)[0]
+        self.assertEqual(author.get('name'), 'John Doe')
+        self.assertEqual(author.get('email'), 'jdoe@example.com')
+        contributor = fe.contributor(name='John Doe', email='jdoe@ex.com')[0]
+        self.assertEqual(contributor, fe.contributor()[0])
+        self.assertEqual(contributor.get('name'), 'John Doe')
+        self.assertEqual(contributor.get('email'), 'jdoe@ex.com')
+        link = fe.link(href='http://lkiesow.de', rel='alternate')[0]
+        self.assertEqual(link, fe.link()[0])
+        self.assertEqual(link.get('href'), 'http://lkiesow.de')
+        self.assertEqual(link.get('rel'), 'alternate')
+        fe.guid('123')
+        self.assertEqual(fe.guid().get('guid'), '123')
+        fe.updated('2017-02-05 13:26:58+01:00')
+        self.assertEqual(fe.updated().year, 2017)
+        fe.summary('asdf')
+        self.assertEqual(fe.summary(), {'summary': 'asdf'})
+        fe.description('asdfx')
+        self.assertEqual(fe.description(), 'asdfx')
+        fe.pubDate('2017-02-05 13:26:58+01:00')
+        self.assertEqual(fe.pubDate().year, 2017)
+        fe.rights('asdfx')
+        self.assertEqual(fe.rights(), 'asdfx')
+        source = fe.source(url='https://example.com', title='Test')
+        self.assertEqual(source.get('title'), 'Test')
+        self.assertEqual(source.get('url'), 'https://example.com')
+        fe.comments('asdfx')
+        self.assertEqual(fe.comments(), 'asdfx')
+        fe.enclosure(url='http://lkiesow.de', type='text/plain', length='1')
+        self.assertEqual(fe.enclosure().get('url'), 'http://lkiesow.de')
+        fe.ttl(8)
+        self.assertEqual(fe.ttl(), 8)
+
+        self.fg.rss_str()
+        self.fg.atom_str()
+
+    def test_checkItemNumbers(self):
+        fg = self.fg
+        self.assertEqual(len(fg.item()), 3)
+
+    def test_checkEntryContent(self):
+        fg = self.fg
+        self.assertTrue(fg.entry())
+
+    def test_removeEntryByIndex(self):
+        fg = FeedGenerator()
+        self.feedId = 'http://example.com'
+        self.title = 'Some Testfeed'
+
+        fe = fg.add_entry()
+        fe.id('http://lernfunk.de/media/654321/1')
+        fe.title('The Third Episode')
+        self.assertEqual(len(fg.entry()), 1)
+        fg.remove_entry(0)
+        self.assertEqual(len(fg.entry()), 0)
+
+    def test_removeEntryByEntry(self):
+        fg = FeedGenerator()
+        self.feedId = 'http://example.com'
+        self.title = 'Some Testfeed'
+
+        fe = fg.add_entry()
+        fe.id('http://lernfunk.de/media/654321/1')
+        fe.title('The Third Episode')
+
+        self.assertEqual(len(fg.entry()), 1)
+        fg.remove_entry(fe)
+        self.assertEqual(len(fg.entry()), 0)
+
+    def test_categoryHasDomain(self):
+        fg = FeedGenerator()
+        fg.title('some title')
+        fg.link(href='http://www.dontcare.com', rel='alternate')
+        fg.description('description')
+        fe = fg.add_entry()
+        fe.id('http://lernfunk.de/media/654321/1')
+        fe.title('some title')
+        fe.category([
+             {'term': 'category',
+              'scheme': 'http://somedomain.com/category',
+              'label': 'Category',
+              }])
+
+        result = fg.rss_str()
+        self.assertIn(b'domain="http://somedomain.com/category"', result)
+
+    def test_content_cdata_type(self):
+        fg = FeedGenerator()
+        fg.title('some title')
+        fg.id('http://lernfunk.de/media/654322/1')
+        fe = fg.add_entry()
+        fe.id('http://lernfunk.de/media/654322/1')
+        fe.title('some title')
+        fe.content('content', type='CDATA')
+        result = fg.atom_str()
+        expected = b'<content type="CDATA"><![CDATA[content]]></content>'
+        self.assertIn(expected, result)
+
+    def test_summary_html_type(self):
+        fg = FeedGenerator()
+        fg.title('some title')
+        fg.id('http://lernfunk.de/media/654322/1')
+        fe = fg.add_entry()
+        fe.id('http://lernfunk.de/media/654322/1')
+        fe.title('some title')
+        fe.link(href='http://lernfunk.de/media/654322/1')
+        fe.summary('<p>summary</p>', type='html')
+        result = fg.atom_str()
+        expected = b'<summary type="html">&lt;p&gt;summary&lt;/p&gt;</summary>'
+        self.assertIn(expected, result)
diff --git a/tests/test_extensions/__init__.py b/tests/test_extensions/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tests/test_extensions/__init__.py
diff --git a/tests/test_extensions/test_dc.py b/tests/test_extensions/test_dc.py
new file mode 100644
index 0000000..af7dd94
--- /dev/null
+++ b/tests/test_extensions/test_dc.py
@@ -0,0 +1,31 @@
+import unittest
+
+from feedgen.feed import FeedGenerator
+
+
+class TestExtensionDc(unittest.TestCase):
+
+    def setUp(self):
+        self.fg = FeedGenerator()
+        self.fg.load_extension('dc')
+        self.fg.title('title')
+        self.fg.link(href='http://example.com', rel='self')
+        self.fg.description('description')
+
+    def test_entryLoadExtension(self):
+        fe = self.fg.add_item()
+        try:
+            fe.load_extension('dc')
+        except ImportError:
+            pass  # Extension already loaded
+
+    def test_elements(self):
+        for method in dir(self.fg.dc):
+            if method.startswith('dc_'):
+                m = getattr(self.fg.dc, method)
+                m(method)
+                self.assertEqual(m(), [method])
+
+        self.fg.id('123')
+        self.assertTrue(self.fg.atom_str())
+        self.assertTrue(self.fg.rss_str())
diff --git a/tests/test_extensions/test_geo.py b/tests/test_extensions/test_geo.py
new file mode 100644
index 0000000..5de1f80
--- /dev/null
+++ b/tests/test_extensions/test_geo.py
@@ -0,0 +1,430 @@
+from itertools import chain
+import unittest
+import warnings
+
+from lxml import etree
+
+from feedgen.feed import FeedGenerator
+from feedgen.ext.geo_entry import GeoRSSPolygonInteriorWarning, GeoRSSGeometryError  # noqa: E501
+
+
+class Geom(object):
+    """
+    Dummy geom to make testing easier
+
+    When we use the geo-interface we need a class with a `__geo_interface__`
+    property. Makes it easier for the other tests as well.
+
+    Ultimately this could be used to generate dummy geometries for testing
+    a wider variety of values (e.g. with the faker library, or the hypothesis
+    library)
+    """
+
+    def __init__(self, geom_type, coords):
+        self.geom_type = geom_type
+        self.coords = coords
+
+    def __str__(self):
+        if self.geom_type == 'Point':
+
+            coords = '{:f} {:f}'.format(
+                self.coords[1],  # latitude is y
+                self.coords[0]
+            )
+            return coords
+
+        elif self.geom_type == 'LineString':
+
+            coords = ' '.join(
+                '{:f} {:f}'.format(vertex[1], vertex[0])
+                for vertex in
+                self.coords
+            )
+            return coords
+
+        elif self.geom_type == 'Polygon':
+
+            coords = ' '.join(
+                '{:f} {:f}'.format(vertex[1], vertex[0])
+                for vertex in
+                self.coords[0]
+            )
+            return coords
+
+        elif self.geom_type == 'Box':
+            # box not really supported by GeoJSON, but it's a handy cheat here
+            # for testing
+            coords = ' '.join(
+                '{:f} {:f}'.format(vertex[1], vertex[0])
+                for vertex in
+                self.coords
+            )
+            return coords[:2]
+
+        else:
+            return 'Not a supported geometry'
+
+    @property
+    def __geo_interface__(self):
+        return {
+            'type': self.geom_type,
+            'coordinates': self.coords
+        }
+
+
+class TestExtensionGeo(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        cls.point = Geom('Point', [-71.05, 42.36])
+        cls.line = Geom('LineString', [[-71.05, 42.36], [-71.15, 42.46]])
+        cls.polygon = Geom(
+            'Polygon',
+            [[[-71.05, 42.36], [-71.15, 42.46], [-71.15, 42.36]]]
+        )
+        cls.box = Geom('Box', [[-71.05, 42.36], [-71.15, 42.46]])
+        cls.polygon_with_interior = Geom(
+            'Polygon',
+            [
+                [  # exterior
+                    [0, 0],
+                    [0, 1],
+                    [1, 1],
+                    [1, 0],
+                    [0, 0]
+                ],
+                [  # interior
+                    [0.25, 0.25],
+                    [0.25, 0.75],
+                    [0.75, 0.75],
+                    [0.75, 0.25],
+                    [0.25, 0.25]
+                ]
+            ]
+        )
+
+    def setUp(self):
+        self.fg = FeedGenerator()
+        self.fg.load_extension('geo')
+        self.fg.title('title')
+        self.fg.link(href='http://example.com', rel='self')
+        self.fg.description('description')
+
+    def test_point(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.point(str(self.point))
+
+        self.assertEqual(fe.geo.point(), str(self.point))
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        point = root.xpath('/rss/channel/item/georss:point/text()',
+                           namespaces=ns)
+        self.assertEqual(point, [str(self.point)])
+
+    def test_line(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.line(str(self.line))
+
+        self.assertEqual(fe.geo.line(), str(self.line))
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        line = root.xpath(
+            '/rss/channel/item/georss:line/text()',
+            namespaces=ns
+        )
+        self.assertEqual(line, [str(self.line)])
+
+    def test_polygon(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.polygon(str(self.polygon))
+
+        self.assertEqual(fe.geo.polygon(), str(self.polygon))
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        poly = root.xpath(
+            '/rss/channel/item/georss:polygon/text()',
+            namespaces=ns
+        )
+        self.assertEqual(poly, [str(self.polygon)])
+
+    def test_box(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.box(str(self.box))
+
+        self.assertEqual(fe.geo.box(), str(self.box))
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        box = root.xpath(
+            '/rss/channel/item/georss:box/text()',
+            namespaces=ns
+        )
+        self.assertEqual(box, [str(self.box)])
+
+    def test_featuretypetag(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.featuretypetag('city')
+
+        self.assertEqual(fe.geo.featuretypetag(), 'city')
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        featuretypetag = root.xpath(
+            '/rss/channel/item/georss:featuretypetag/text()',
+            namespaces=ns
+        )
+        self.assertEqual(featuretypetag, ['city'])
+
+    def test_relationshiptag(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.relationshiptag('is-centred-at')
+
+        self.assertEqual(fe.geo.relationshiptag(), 'is-centred-at')
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        relationshiptag = root.xpath(
+            '/rss/channel/item/georss:relationshiptag/text()',
+            namespaces=ns
+        )
+        self.assertEqual(relationshiptag, ['is-centred-at'])
+
+    def test_featurename(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.featurename('Footscray')
+
+        self.assertEqual(fe.geo.featurename(), 'Footscray')
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        featurename = root.xpath(
+            '/rss/channel/item/georss:featurename/text()',
+            namespaces=ns
+        )
+        self.assertEqual(featurename, ['Footscray'])
+
+    def test_elev(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.elev(100.3)
+
+        self.assertEqual(fe.geo.elev(), 100.3)
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        elev = root.xpath(
+            '/rss/channel/item/georss:elev/text()',
+            namespaces=ns
+        )
+        self.assertEqual(elev, ['100.3'])
+
+    def test_elev_fails_nonnumeric(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+
+        with self.assertRaises(ValueError):
+            fe.geo.elev('100.3')
+
+    def test_floor(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.floor(4)
+
+        self.assertEqual(fe.geo.floor(), 4)
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        floor = root.xpath(
+            '/rss/channel/item/georss:floor/text()',
+            namespaces=ns
+        )
+        self.assertEqual(floor, ['4'])
+
+    def test_floor_fails_nonint(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+
+        with self.assertRaises(ValueError):
+            fe.geo.floor(100.3)
+
+        with self.assertRaises(ValueError):
+            fe.geo.floor('4')
+
+    def test_radius(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.radius(100.3)
+
+        self.assertEqual(fe.geo.radius(), 100.3)
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        radius = root.xpath(
+            '/rss/channel/item/georss:radius/text()',
+            namespaces=ns
+        )
+        self.assertEqual(radius, ['100.3'])
+
+    def test_radius_fails_nonnumeric(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+
+        with self.assertRaises(ValueError):
+            fe.geo.radius('100.3')
+
+    def test_geom_from_geointerface_point(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.geom_from_geo_interface(self.point)
+
+        self.assertEqual(fe.geo.point(), str(self.point))
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        point = root.xpath('/rss/channel/item/georss:point/text()',
+                           namespaces=ns)
+        self.assertEqual(point, [str(self.point)])
+
+        coords = [float(c) for c in point[0].split()]
+
+        try:
+            self.assertCountEqual(
+                coords,
+                self.point.coords
+            )
+        except AttributeError:  # was assertItemsEqual in Python 2.7
+            self.assertItemsEqual(
+                coords,
+                self.point.coords
+            )
+
+    def test_geom_from_geointerface_line(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.geom_from_geo_interface(self.line)
+
+        self.assertEqual(fe.geo.line(), str(self.line))
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        line = root.xpath('/rss/channel/item/georss:line/text()',
+                          namespaces=ns)
+        self.assertEqual(line, [str(self.line)])
+
+        coords = [float(c) for c in line[0].split()]
+
+        try:
+            self.assertCountEqual(
+                coords,
+                list(chain.from_iterable(self.line.coords))
+            )
+        except AttributeError:  # was assertItemsEqual in Python 2.7
+            self.assertItemsEqual(
+                coords,
+                list(chain.from_iterable(self.line.coords))
+            )
+
+    def test_geom_from_geointerface_poly(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.geo.geom_from_geo_interface(self.polygon)
+
+        self.assertEqual(fe.geo.polygon(), str(self.polygon))
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        poly = root.xpath('/rss/channel/item/georss:polygon/text()',
+                          namespaces=ns)
+        self.assertEqual(poly, [str(self.polygon)])
+
+        coords = [float(c) for c in poly[0].split()]
+
+        try:
+            self.assertCountEqual(
+                coords,
+                list(chain.from_iterable(self.polygon.coords[0]))
+            )
+        except AttributeError:  # was assertItemsEqual in Python 2.7
+            self.assertItemsEqual(
+                coords,
+                list(chain.from_iterable(self.polygon.coords[0]))
+            )
+
+    def test_geom_from_geointerface_fail_other_geom(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+
+        with self.assertRaises(GeoRSSGeometryError):
+            fe.geo.geom_from_geo_interface(self.box)
+
+    def test_geom_from_geointerface_fail_requires_geo_interface(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+
+        with self.assertRaises(AttributeError):
+            fe.geo.geom_from_geo_interface(str(self.box))
+
+    def test_geom_from_geointerface_warn_poly_interior(self):
+        """
+        Test complex polygons warn as expected. Taken from
+
+        https://stackoverflow.com/a/3892301/379566 and
+        https://docs.python.org/2.7/library/warnings.html#testing-warnings
+        """
+        fe = self.fg.add_item()
+        fe.title('y')
+
+        with warnings.catch_warnings(record=True) as w:
+            # Cause all warnings to always be triggered.
+            warnings.simplefilter("always")
+            # Trigger a warning.
+            fe.geo.geom_from_geo_interface(self.polygon_with_interior)
+            # Verify some things
+            self.assertEqual(len(w), 1)
+            self.assertTrue(issubclass(w[-1].category,
+                                       GeoRSSPolygonInteriorWarning))
+
+        self.assertEqual(fe.geo.polygon(), str(self.polygon_with_interior))
+
+        # Check that we have the item in the resulting XML
+        ns = {'georss': 'http://www.georss.org/georss'}
+        root = etree.fromstring(self.fg.rss_str())
+        poly = root.xpath('/rss/channel/item/georss:polygon/text()',
+                          namespaces=ns)
+        self.assertEqual(poly, [str(self.polygon_with_interior)])
+
+        coords = [float(c) for c in poly[0].split()]
+
+        try:
+            self.assertCountEqual(
+                coords,
+                list(chain.from_iterable(self.polygon_with_interior.coords[0]))
+            )
+        except AttributeError:  # was assertItemsEqual in Python 2.7
+            self.assertItemsEqual(
+                coords,
+                list(chain.from_iterable(self.polygon_with_interior.coords[0]))
+            )
diff --git a/tests/test_extensions/test_media.py b/tests/test_extensions/test_media.py
new file mode 100644
index 0000000..1f5a349
--- /dev/null
+++ b/tests/test_extensions/test_media.py
@@ -0,0 +1,83 @@
+import unittest
+
+from lxml import etree
+
+from feedgen.feed import FeedGenerator
+
+
+class TestExtensionMedia(unittest.TestCase):
+
+    def setUp(self):
+        self.fg = FeedGenerator()
+        self.fg.load_extension('media')
+        self.fg.id('id')
+        self.fg.title('title')
+        self.fg.link(href='http://example.com', rel='self')
+        self.fg.description('description')
+
+    def test_media_content(self):
+        fe = self.fg.add_item()
+        fe.id('id')
+        fe.title('title')
+        fe.content('content')
+        fe.media.content(url='file1.xy')
+        fe.media.content(url='file2.xy')
+        fe.media.content(url='file1.xy', group=2)
+        fe.media.content(url='file2.xy', group=2)
+        fe.media.content(url='file.xy', group=None)
+
+        ns = {'media': 'http://search.yahoo.com/mrss/',
+              'a': 'http://www.w3.org/2005/Atom'}
+        # Check that we have the item in the resulting RSS
+        root = etree.fromstring(self.fg.rss_str())
+        url = root.xpath('/rss/channel/item/media:group/media:content[1]/@url',
+                         namespaces=ns)
+        self.assertEqual(url, ['file1.xy', 'file1.xy'])
+
+        # There is one without a group
+        url = root.xpath('/rss/channel/item/media:content[1]/@url',
+                         namespaces=ns)
+        self.assertEqual(url, ['file.xy'])
+
+        # Check that we have the item in the resulting Atom feed
+        root = etree.fromstring(self.fg.atom_str())
+        url = root.xpath('/a:feed/a:entry/media:group/media:content[1]/@url',
+                         namespaces=ns)
+        self.assertEqual(url, ['file1.xy', 'file1.xy'])
+
+        fe.media.content(content=[], replace=True)
+        self.assertEqual(fe.media.content(), [])
+
+    def test_media_thumbnail(self):
+        fe = self.fg.add_item()
+        fe.id('id')
+        fe.title('title')
+        fe.content('content')
+        fe.media.thumbnail(url='file1.xy')
+        fe.media.thumbnail(url='file2.xy')
+        fe.media.thumbnail(url='file1.xy', group=2)
+        fe.media.thumbnail(url='file2.xy', group=2)
+        fe.media.thumbnail(url='file.xy', group=None)
+
+        ns = {'media': 'http://search.yahoo.com/mrss/',
+              'a': 'http://www.w3.org/2005/Atom'}
+        # Check that we have the item in the resulting RSS
+        root = etree.fromstring(self.fg.rss_str())
+        url = root.xpath(
+                '/rss/channel/item/media:group/media:thumbnail[1]/@url',
+                namespaces=ns)
+        self.assertEqual(url, ['file1.xy', 'file1.xy'])
+
+        # There is one without a group
+        url = root.xpath('/rss/channel/item/media:thumbnail[1]/@url',
+                         namespaces=ns)
+        self.assertEqual(url, ['file.xy'])
+
+        # Check that we have the item in the resulting Atom feed
+        root = etree.fromstring(self.fg.atom_str())
+        url = root.xpath('/a:feed/a:entry/media:group/media:thumbnail[1]/@url',
+                         namespaces=ns)
+        self.assertEqual(url, ['file1.xy', 'file1.xy'])
+
+        fe.media.thumbnail(thumbnail=[], replace=True)
+        self.assertEqual(fe.media.thumbnail(), [])
diff --git a/tests/test_extensions/test_podcast.py b/tests/test_extensions/test_podcast.py
new file mode 100644
index 0000000..84c8c96
--- /dev/null
+++ b/tests/test_extensions/test_podcast.py
@@ -0,0 +1,106 @@
+import unittest
+
+from lxml import etree
+
+from feedgen.feed import FeedGenerator
+
+
+class TestExtensionPodcast(unittest.TestCase):
+
+    def setUp(self):
+        self.fg = FeedGenerator()
+        self.fg.load_extension('podcast')
+        self.fg.title('title')
+        self.fg.link(href='http://example.com', rel='self')
+        self.fg.description('description')
+
+    def test_category_new(self):
+        self.fg.podcast.itunes_category([{'cat': 'Technology',
+                                          'sub': 'Podcasting'}])
+        self.fg.podcast.itunes_explicit('no')
+        self.fg.podcast.itunes_complete('no')
+        self.fg.podcast.itunes_new_feed_url('http://example.com/new-feed.rss')
+        self.fg.podcast.itunes_owner('John Doe', 'john@example.com')
+        ns = {'itunes': 'http://www.itunes.com/dtds/podcast-1.0.dtd'}
+        root = etree.fromstring(self.fg.rss_str())
+        cat = root.xpath('/rss/channel/itunes:category/@text', namespaces=ns)
+        scat = root.xpath('/rss/channel/itunes:category/itunes:category/@text',
+                          namespaces=ns)
+        self.assertEqual(cat[0], 'Technology')
+        self.assertEqual(scat[0], 'Podcasting')
+
+    def test_category(self):
+        self.fg.podcast.itunes_category('Technology', 'Podcasting')
+        self.fg.podcast.itunes_explicit('no')
+        self.fg.podcast.itunes_complete('no')
+        self.fg.podcast.itunes_new_feed_url('http://example.com/new-feed.rss')
+        self.fg.podcast.itunes_owner('John Doe', 'john@example.com')
+        ns = {'itunes': 'http://www.itunes.com/dtds/podcast-1.0.dtd'}
+        root = etree.fromstring(self.fg.rss_str())
+        cat = root.xpath('/rss/channel/itunes:category/@text', namespaces=ns)
+        scat = root.xpath('/rss/channel/itunes:category/itunes:category/@text',
+                          namespaces=ns)
+        self.assertEqual(cat[0], 'Technology')
+        self.assertEqual(scat[0], 'Podcasting')
+
+    def test_podcastItems(self):
+        fg = self.fg
+        fg.podcast.itunes_author('Lars Kiesow')
+        fg.podcast.itunes_block('x')
+        fg.podcast.itunes_complete(False)
+        fg.podcast.itunes_explicit('no')
+        fg.podcast.itunes_image('x.png')
+        fg.podcast.itunes_subtitle('x')
+        fg.podcast.itunes_summary('x')
+        fg.podcast.itunes_type('episodic')
+        self.assertEqual(fg.podcast.itunes_author(), 'Lars Kiesow')
+        self.assertEqual(fg.podcast.itunes_block(), 'x')
+        self.assertEqual(fg.podcast.itunes_complete(), 'no')
+        self.assertEqual(fg.podcast.itunes_explicit(), 'no')
+        self.assertEqual(fg.podcast.itunes_image(), 'x.png')
+        self.assertEqual(fg.podcast.itunes_subtitle(), 'x')
+        self.assertEqual(fg.podcast.itunes_summary(), 'x')
+        self.assertEqual(fg.podcast.itunes_type(), 'episodic')
+
+        # Check that we have the item in the resulting XML
+        ns = {'itunes': 'http://www.itunes.com/dtds/podcast-1.0.dtd'}
+        root = etree.fromstring(self.fg.rss_str())
+        author = root.xpath('/rss/channel/itunes:author/text()', namespaces=ns)
+        self.assertEqual(author, ['Lars Kiesow'])
+
+    def test_podcastEntryItems(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.podcast.itunes_author('Lars Kiesow')
+        fe.podcast.itunes_block('x')
+        fe.podcast.itunes_duration('00:01:30')
+        fe.podcast.itunes_explicit('no')
+        fe.podcast.itunes_image('x.png')
+        fe.podcast.itunes_is_closed_captioned('yes')
+        fe.podcast.itunes_order(1)
+        fe.podcast.itunes_subtitle('x')
+        fe.podcast.itunes_summary('x')
+        fe.podcast.itunes_season(1)
+        fe.podcast.itunes_episode(1)
+        fe.podcast.itunes_title('Podcast Title')
+        fe.podcast.itunes_episode_type('full')
+        self.assertEqual(fe.podcast.itunes_author(), 'Lars Kiesow')
+        self.assertEqual(fe.podcast.itunes_block(), 'x')
+        self.assertEqual(fe.podcast.itunes_duration(), '00:01:30')
+        self.assertEqual(fe.podcast.itunes_explicit(), 'no')
+        self.assertEqual(fe.podcast.itunes_image(), 'x.png')
+        self.assertTrue(fe.podcast.itunes_is_closed_captioned())
+        self.assertEqual(fe.podcast.itunes_order(), 1)
+        self.assertEqual(fe.podcast.itunes_subtitle(), 'x')
+        self.assertEqual(fe.podcast.itunes_summary(), 'x')
+        self.assertEqual(fe.podcast.itunes_season(), 1)
+        self.assertEqual(fe.podcast.itunes_episode(), 1)
+        self.assertEqual(fe.podcast.itunes_title(), 'Podcast Title')
+        self.assertEqual(fe.podcast.itunes_episode_type(), 'full')
+
+        # Check that we have the item in the resulting XML
+        ns = {'itunes': 'http://www.itunes.com/dtds/podcast-1.0.dtd'}
+        root = etree.fromstring(self.fg.rss_str())
+        author = root.xpath('/rss/channel/item/itunes:author/text()',
+                            namespaces=ns)
+        self.assertEqual(author, ['Lars Kiesow'])
diff --git a/tests/test_extensions/test_syndication.py b/tests/test_extensions/test_syndication.py
new file mode 100644
index 0000000..029e100
--- /dev/null
+++ b/tests/test_extensions/test_syndication.py
@@ -0,0 +1,40 @@
+import unittest
+
+from lxml import etree
+
+from feedgen.feed import FeedGenerator
+
+
+class TestExtensionSyndication(unittest.TestCase):
+
+    SYN_NS = {'sy': 'http://purl.org/rss/1.0/modules/syndication/'}
+
+    def setUp(self):
+        self.fg = FeedGenerator()
+        self.fg.load_extension('syndication')
+        self.fg.title('title')
+        self.fg.link(href='http://example.com', rel='self')
+        self.fg.description('description')
+
+    def test_update_period(self):
+        for period_type in ('hourly', 'daily', 'weekly', 'monthly', 'yearly'):
+            self.fg.syndication.update_period(period_type)
+            root = etree.fromstring(self.fg.rss_str())
+            a = root.xpath('/rss/channel/sy:UpdatePeriod',
+                           namespaces=self.SYN_NS)
+            self.assertEqual(a[0].text, period_type)
+
+    def test_update_frequency(self):
+        for frequency in (1, 100, 2000, 100000):
+            self.fg.syndication.update_frequency(frequency)
+            root = etree.fromstring(self.fg.rss_str())
+            a = root.xpath('/rss/channel/sy:UpdateFrequency',
+                           namespaces=self.SYN_NS)
+            self.assertEqual(a[0].text, str(frequency))
+
+    def test_update_base(self):
+        base = '2000-01-01T12:00+00:00'
+        self.fg.syndication.update_base(base)
+        root = etree.fromstring(self.fg.rss_str())
+        a = root.xpath('/rss/channel/sy:UpdateBase', namespaces=self.SYN_NS)
+        self.assertEqual(a[0].text, base)
diff --git a/tests/test_extensions/test_torrent.py b/tests/test_extensions/test_torrent.py
new file mode 100644
index 0000000..230ec1a
--- /dev/null
+++ b/tests/test_extensions/test_torrent.py
@@ -0,0 +1,38 @@
+import unittest
+
+from lxml import etree
+
+from feedgen.feed import FeedGenerator
+
+
+class TestExtensionTorrent(unittest.TestCase):
+
+    def setUp(self):
+        self.fg = FeedGenerator()
+        self.fg.load_extension('torrent')
+        self.fg.title('title')
+        self.fg.link(href='http://example.com', rel='self')
+        self.fg.description('description')
+
+    def test_podcastEntryItems(self):
+        fe = self.fg.add_item()
+        fe.title('y')
+        fe.torrent.filename('file.xy')
+        fe.torrent.infohash('123')
+        fe.torrent.contentlength('23')
+        fe.torrent.seeds('1')
+        fe.torrent.peers('2')
+        fe.torrent.verified('1')
+        self.assertEqual(fe.torrent.filename(), 'file.xy')
+        self.assertEqual(fe.torrent.infohash(), '123')
+        self.assertEqual(fe.torrent.contentlength(), '23')
+        self.assertEqual(fe.torrent.seeds(), '1')
+        self.assertEqual(fe.torrent.peers(), '2')
+        self.assertEqual(fe.torrent.verified(), '1')
+
+        # Check that we have the item in the resulting XML
+        ns = {'torrent': 'http://xmlns.ezrss.it/0.1/dtd/'}
+        root = etree.fromstring(self.fg.rss_str())
+        filename = root.xpath('/rss/channel/item/torrent:filename/text()',
+                              namespaces=ns)
+        self.assertEqual(filename, ['file.xy'])
diff --git a/tests/test_feed.py b/tests/test_feed.py
new file mode 100644
index 0000000..d09014d
--- /dev/null
+++ b/tests/test_feed.py
@@ -0,0 +1,401 @@
+# -*- coding: utf-8 -*-
+
+"""
+Tests for a basic feed
+
+These are test cases for a basic feed.
+A basic feed does not contain entries so far.
+"""
+
+import os
+import tempfile
+import unittest
+
+from lxml import etree
+
+from feedgen.ext.dc import DcEntryExtension, DcExtension
+from feedgen.feed import FeedGenerator
+
+
+class TestSequenceFunctions(unittest.TestCase):
+
+    def setUp(self):
+
+        fg = FeedGenerator()
+
+        self.nsAtom = "http://www.w3.org/2005/Atom"
+        self.nsRss = "http://purl.org/rss/1.0/modules/content/"
+
+        self.feedId = 'http://lernfunk.de/media/654321'
+        self.title = 'Some Testfeed'
+
+        self.authorName = 'John Doe'
+        self.authorMail = 'john@example.de'
+        self.author = {'name': self.authorName, 'email': self.authorMail}
+
+        self.linkHref = 'http://example.com'
+        self.linkRel = 'alternate'
+
+        self.logo = 'http://ex.com/logo.jpg'
+        self.subtitle = 'This is a cool feed!'
+
+        self.link2Href = 'http://larskiesow.de/test.atom'
+        self.link2Rel = 'self'
+
+        self.language = 'en'
+
+        self.categoryTerm = 'This category term'
+        self.categoryScheme = 'This category scheme'
+        self.categoryLabel = 'This category label'
+
+        self.cloudDomain = 'example.com'
+        self.cloudPort = '4711'
+        self.cloudPath = '/ws/example'
+        self.cloudRegisterProcedure = 'registerProcedure'
+        self.cloudProtocol = 'SOAP 1.1'
+
+        self.icon = "http://example.com/icon.png"
+        self.contributor = {'name': "Contributor Name",
+                            'uri': "Contributor Uri",
+                            'email': 'Contributor email'}
+        self.copyright = "The copyright notice"
+        self.docs = 'http://www.rssboard.org/rss-specification'
+        self.managingEditor = 'mail@example.com'
+        self.rating = '(PICS-1.1 "http://www.classify.org/safesurf/" ' + \
+            '1 r (SS~~000 1))'
+        self.skipDays = 'Tuesday'
+        self.skipHours = 23
+
+        self.textInputTitle = "Text input title"
+        self.textInputDescription = "Text input description"
+        self.textInputName = "Text input name"
+        self.textInputLink = "Text input link"
+
+        self.ttl = 900
+
+        self.webMaster = 'webmaster@example.com'
+
+        fg.id(self.feedId)
+        fg.title(self.title)
+        fg.author(self.author)
+        fg.link(href=self.linkHref, rel=self.linkRel)
+        fg.logo(self.logo)
+        fg.subtitle(self.subtitle)
+        fg.link(href=self.link2Href, rel=self.link2Rel)
+        fg.language(self.language)
+        fg.cloud(domain=self.cloudDomain, port=self.cloudPort,
+                 path=self.cloudPath,
+                 registerProcedure=self.cloudRegisterProcedure,
+                 protocol=self.cloudProtocol)
+        fg.icon(self.icon)
+        fg.category(term=self.categoryTerm, scheme=self.categoryScheme,
+                    label=self.categoryLabel)
+        fg.contributor(self.contributor)
+        fg.copyright(self.copyright)
+        fg.docs(docs=self.docs)
+        fg.managingEditor(self.managingEditor)
+        fg.rating(self.rating)
+        fg.skipDays(self.skipDays)
+        fg.skipHours(self.skipHours)
+        fg.textInput(title=self.textInputTitle,
+                     description=self.textInputDescription,
+                     name=self.textInputName, link=self.textInputLink)
+        fg.ttl(self.ttl)
+        fg.webMaster(self.webMaster)
+        fg.updated('2017-02-05 13:26:58+01:00')
+        fg.pubDate('2017-02-05 13:26:58+01:00')
+        fg.generator('python-feedgen', 'x', uri='http://github.com/lkie...')
+        fg.image(url=self.logo,
+                 title=self.title,
+                 link=self.link2Href,
+                 width='123',
+                 height='123',
+                 description='Example Inage')
+
+        self.fg = fg
+
+    def test_baseFeed(self):
+        fg = self.fg
+
+        self.assertEqual(fg.id(), self.feedId)
+        self.assertEqual(fg.title(), self.title)
+
+        self.assertEqual(fg.author()[0]['name'], self.authorName)
+        self.assertEqual(fg.author()[0]['email'], self.authorMail)
+
+        self.assertEqual(fg.link()[0]['href'], self.linkHref)
+        self.assertEqual(fg.link()[0]['rel'], self.linkRel)
+
+        self.assertEqual(fg.logo(), self.logo)
+        self.assertEqual(fg.subtitle(), self.subtitle)
+
+        self.assertEqual(fg.link()[1]['href'], self.link2Href)
+        self.assertEqual(fg.link()[1]['rel'], self.link2Rel)
+
+        self.assertEqual(fg.language(), self.language)
+
+    def test_atomFeedFile(self):
+        fg = self.fg
+        fh, filename = tempfile.mkstemp()
+        fg.atom_file(filename=filename, pretty=True, xml_declaration=False)
+
+        with open(filename, "r") as myfile:
+            atomString = myfile.read().replace('\n', '')
+
+        self.checkAtomString(atomString)
+        os.close(fh)
+        os.remove(filename)
+
+    def test_atomFeedString(self):
+        fg = self.fg
+
+        atomString = fg.atom_str(pretty=True, xml_declaration=False)
+        self.checkAtomString(atomString)
+
+    def test_rel_values_for_atom(self):
+        values_for_rel = [
+            'about', 'alternate', 'appendix', 'archives', 'author', 'bookmark',
+            'canonical', 'chapter', 'collection', 'contents', 'copyright',
+            'create-form', 'current', 'derivedfrom', 'describedby',
+            'describes', 'disclosure', 'duplicate', 'edit', 'edit-form',
+            'edit-media', 'enclosure', 'first', 'glossary', 'help', 'hosts',
+            'hub', 'icon', 'index', 'item', 'last', 'latest-version',
+            'license', 'lrdd', 'memento', 'monitor', 'monitor-group', 'next',
+            'next-archive', 'nofollow', 'noreferrer', 'original', 'payment',
+            'predecessor-version', 'prefetch', 'prev', 'preview', 'previous',
+            'prev-archive', 'privacy-policy', 'profile', 'related', 'replies',
+            'search', 'section', 'self', 'service', 'start', 'stylesheet',
+            'subsection', 'successor-version', 'tag', 'terms-of-service',
+            'timegate', 'timemap', 'type', 'up', 'version-history', 'via',
+            'working-copy', 'working-copy-of']
+        links = [{'href': '%s/%s' % (self.linkHref,
+                                     val.replace('-', '_')), 'rel': val}
+                 for val in values_for_rel]
+        fg = self.fg
+        fg.link(links, replace=True)
+        atomString = fg.atom_str(pretty=True, xml_declaration=False)
+        feed = etree.fromstring(atomString)
+        nsAtom = self.nsAtom
+        feed_links = feed.findall("{%s}link" % nsAtom)
+        idx = 0
+        self.assertEqual(len(links), len(feed_links))
+        while idx < len(values_for_rel):
+            self.assertEqual(feed_links[idx].get('href'), links[idx]['href'])
+            self.assertEqual(feed_links[idx].get('rel'), links[idx]['rel'])
+            idx += 1
+
+    def test_rel_values_for_rss(self):
+        values_for_rel = [
+            'about', 'alternate', 'appendix', 'archives', 'author', 'bookmark',
+            'canonical', 'chapter', 'collection', 'contents', 'copyright',
+            'create-form', 'current', 'derivedfrom', 'describedby',
+            'describes', 'disclosure', 'duplicate', 'edit', 'edit-form',
+            'edit-media', 'enclosure', 'first', 'glossary', 'help', 'hosts',
+            'hub', 'icon', 'index', 'item', 'last', 'latest-version',
+            'license', 'lrdd', 'memento', 'monitor', 'monitor-group', 'next',
+            'next-archive', 'nofollow', 'noreferrer', 'original', 'payment',
+            'predecessor-version', 'prefetch', 'prev', 'preview', 'previous',
+            'prev-archive', 'privacy-policy', 'profile', 'related', 'replies',
+            'search', 'section', 'self', 'service', 'start', 'stylesheet',
+            'subsection', 'successor-version', 'tag', 'terms-of-service',
+            'timegate', 'timemap', 'type', 'up', 'version-history', 'via',
+            'working-copy', 'working-copy-of']
+        links = [{'href': '%s/%s' % (self.linkHref,
+                                     val.replace('-', '_')), 'rel': val}
+                 for val in values_for_rel]
+        fg = self.fg
+        fg.link(links, replace=True)
+        rssString = fg.rss_str(pretty=True, xml_declaration=False)
+        feed = etree.fromstring(rssString)
+        channel = feed.find("channel")
+        nsAtom = self.nsAtom
+
+        atom_links = channel.findall("{%s}link" % nsAtom)
+        # rss feed only implements atom's 'self' link
+        self.assertEqual(len(atom_links), 1)
+        self.assertEqual(atom_links[0].get('href'),
+                         '%s/%s' % (self.linkHref, 'self'))
+        self.assertEqual(atom_links[0].get('rel'), 'self')
+
+        rss_links = channel.findall('link')
+        # RSS only needs one URL. We use the first link for RSS:
+        self.assertEqual(len(rss_links), 1)
+        self.assertEqual(
+                rss_links[0].text,
+                '%s/%s' % (self.linkHref, 'working-copy-of'.replace('-', '_')))
+
+    def checkAtomString(self, atomString):
+
+        feed = etree.fromstring(atomString)
+
+        nsAtom = "{" + self.nsAtom + "}"
+
+        print(nsAtom)
+        print(f"{nsAtom}title")
+        testcases = [
+            (
+                feed.find(f"{nsAtom}title").text,
+                self.title
+            ), (
+                feed.find(f"{nsAtom}id").text,
+                self.feedId
+            ), (
+                feed.find(f"{nsAtom}category").get('term'),
+                self.categoryTerm
+            ), (
+                feed.find(f"{nsAtom}category").get('label'),
+                self.categoryLabel
+            ), (
+                feed.find(f"{nsAtom}author").find(f"{nsAtom}name").text,
+                self.authorName
+            ), (
+                feed.find(f"{nsAtom}author").find(f"{nsAtom}email").text,
+                self.authorMail
+            ), (
+                feed.findall(f"{nsAtom}link")[0].get('href'),
+                self.linkHref
+            ), (
+                feed.findall(f"{nsAtom}link")[0].get('rel'),
+                self.linkRel
+            ), (
+                feed.findall(f"{nsAtom}link")[1].get('href'),
+                self.link2Href
+            ), (
+                feed.findall(f"{nsAtom}link")[1].get('rel'),
+                self.link2Rel
+            ), (
+                feed.find(f"{nsAtom}logo").text,
+                self.logo
+            ), (
+                feed.find(f"{nsAtom}icon").text,
+                self.icon
+            ), (
+                feed.find(f"{nsAtom}subtitle").text,
+                self.subtitle
+            ), (
+                feed.find(f"{nsAtom}contributor").find(f"{nsAtom}name").text,
+                self.contributor['name']
+            ), (
+                feed.find(f"{nsAtom}contributor").find(f"{nsAtom}email").text,
+                self.contributor['email']
+            ), (
+                feed.find(f"{nsAtom}contributor").find(f"{nsAtom}uri").text,
+                self.contributor['uri']
+            ), (
+                feed.find(f"{nsAtom}rights").text,
+                self.copyright
+            )]
+        for actual, expected in testcases:
+            self.assertEqual(actual, expected)
+
+        self.assertIsNot(
+                feed.find(f"{nsAtom}updated").text,
+                None)
+
+    def test_rssFeedFile(self):
+        fg = self.fg
+        _, filename = tempfile.mkstemp()
+        fg.rss_file(filename=filename, pretty=True, xml_declaration=False)
+
+        with open(filename, "r") as myfile:
+            rssString = myfile.read().replace('\n', '')
+
+        self.checkRssString(rssString)
+
+    def test_rssFeedString(self):
+        fg = self.fg
+        rssString = fg.rss_str(pretty=True, xml_declaration=False)
+        self.checkRssString(rssString)
+
+    def test_loadPodcastExtension(self):
+        fg = self.fg
+        fg.add_entry()
+        fg.load_extension('podcast', atom=True, rss=True)
+        fg.add_entry()
+
+    def test_loadDcExtension(self):
+        fg = self.fg
+        fg.add_entry()
+        fg.load_extension('dc', atom=True, rss=True)
+        fg.add_entry()
+
+    def test_extensionAlreadyLoaded(self):
+        fg = self.fg
+        fg.load_extension('dc', atom=True, rss=True)
+        with self.assertRaises(ImportError):
+            fg.load_extension('dc')
+
+    def test_registerCustomExtension(self):
+        fg = self.fg
+        fg.add_entry()
+        fg.register_extension('dc', DcExtension, DcEntryExtension)
+        fg.add_entry()
+
+    def checkRssString(self, rssString):
+
+        feed = etree.fromstring(rssString)
+        nsAtom = self.nsAtom
+
+        ch = feed.find("channel")
+        self.assertIsNot(ch, None)
+
+        self.assertEqual(ch.find("title").text,
+                         self.title)
+        self.assertEqual(ch.find("description").text,
+                         self.subtitle)
+        self.assertIsNot(ch.find("lastBuildDate").text,
+                         None)
+        self.assertEqual(ch.find("docs").text,
+                         "http://www.rssboard.org/rss-specification")
+        self.assertEqual(ch.find("generator").text,
+                         "python-feedgen")
+        self.assertEqual(ch.findall("{%s}link" % nsAtom)[0].get('href'),
+                         self.link2Href)
+        self.assertEqual(ch.findall("{%s}link" % nsAtom)[0].get('rel'),
+                         self.link2Rel)
+        self.assertEqual(ch.find("image").find("url").text,
+                         self.logo)
+        self.assertEqual(ch.find("image").find("title").text,
+                         self.title)
+        self.assertEqual(ch.find("image").find("link").text,
+                         self.link2Href)
+        self.assertEqual(ch.find("category").text,
+                         self.categoryLabel)
+        self.assertEqual(ch.find("cloud").get('domain'),
+                         self.cloudDomain)
+        self.assertEqual(ch.find("cloud").get('port'),
+                         self.cloudPort)
+        self.assertEqual(ch.find("cloud").get('path'),
+                         self.cloudPath)
+        self.assertEqual(ch.find("cloud").get('registerProcedure'),
+                         self.cloudRegisterProcedure)
+        self.assertEqual(ch.find("cloud").get('protocol'),
+                         self.cloudProtocol)
+        self.assertEqual(ch.find("copyright").text,
+                         self.copyright)
+        self.assertEqual(ch.find("docs").text,
+                         self.docs)
+        self.assertEqual(ch.find("managingEditor").text,
+                         self.managingEditor)
+        self.assertEqual(ch.find("rating").text,
+                         self.rating)
+        self.assertEqual(ch.find("skipDays").find("day").text,
+                         self.skipDays)
+        self.assertEqual(int(ch.find("skipHours").find("hour").text),
+                         self.skipHours)
+        self.assertEqual(ch.find("textInput").get('title'),
+                         self.textInputTitle)
+        self.assertEqual(ch.find("textInput").get('description'),
+                         self.textInputDescription)
+        self.assertEqual(ch.find("textInput").get('name'),
+                         self.textInputName)
+        self.assertEqual(ch.find("textInput").get('link'),
+                         self.textInputLink)
+        self.assertEqual(int(ch.find("ttl").text),
+                         self.ttl)
+        self.assertEqual(ch.find("webMaster").text,
+                         self.webMaster)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tests/test_main.py b/tests/test_main.py
new file mode 100644
index 0000000..af7e981
--- /dev/null
+++ b/tests/test_main.py
@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+
+'''
+Tests for feedgen main
+'''
+
+import os
+import sys
+import tempfile
+import unittest
+
+from feedgen import __main__
+
+
+class TestSequenceFunctions(unittest.TestCase):
+
+    def test_usage(self):
+        sys.argv = ['feedgen']
+        with self.assertRaises(SystemExit) as e:
+            __main__.main()
+        self.assertEqual(e.exception.code, None)
+
+    def test_feed(self):
+        for ftype in 'rss', 'atom', 'podcast', 'torrent', 'dc.rss', \
+                     'dc.atom', 'syndication.rss', 'syndication.atom':
+            sys.argv = ['feedgen', ftype]
+            __main__.main()
+
+    def test_file(self):
+        for extemsion in '.atom', '.rss':
+            fh, filename = tempfile.mkstemp(extemsion)
+            sys.argv = ['feedgen', filename]
+            try:
+                __main__.main()
+            finally:
+                os.close(fh)
+                os.remove(filename)