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<div class="section" id="namespace-handling">
<span id="advanced-namespaces"></span><h1>Namespace Handling<a class="headerlink" href="#namespace-handling" title="Permalink to this headline">¶</a></h1>
<p><strong class="program">Universal Feed Parser</strong> attempts to expose all possible data in feeds,
including elements in extension namespaces.</p>
<p>Some common namespaced elements are mapped to core elements. For further
information about these mappings, see <a class="reference internal" href="reference.html#reference"><em>Reference</em></a>.</p>
<p>Other namespaced elements are available as <tt class="docutils literal"><span class="pre">prefixelement</span></tt>.</p>
<p>The namespaces defined in the feed are available in the parsed results as
<tt class="docutils literal"><span class="pre">namespaces</span></tt>, a dictionary of {prefix: namespaceURI}. If the feed defines a
default namespace, it is listed as <tt class="docutils literal"><span class="pre">namespaces['']</span></tt>.</p>
<div class="section" id="accessing-namespaced-elements">
<h2>Accessing namespaced elements<a class="headerlink" href="#accessing-namespaced-elements" title="Permalink to this headline">¶</a></h2>
<div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">feedparser</span>
<span class="gp">>>> </span><span class="n">d</span> <span class="o">=</span> <span class="n">feedparser</span><span class="o">.</span><span class="n">parse</span><span class="p">(</span><span class="s">'http://feedparser.org/docs/examples/prism.rdf'</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">d</span><span class="o">.</span><span class="n">feed</span><span class="o">.</span><span class="n">prism_issn</span>
<span class="go">u'0028-0836'</span>
<span class="gp">>>> </span><span class="n">d</span><span class="o">.</span><span class="n">namespaces</span>
<span class="go">{'': u'http://purl.org/rss/1.0/',</span>
<span class="go">'prism': u'http://prismstandard.org/namespaces/1.2/basic/',</span>
<span class="go">'rdf': u'http://www.w3.org/1999/02/22-rdf-syntax-ns#'}</span>
</pre></div>
</div>
<p>The prefix used to construct the variable name is not guaranteed to be the same
as the prefix of the namespaced element in the original feed. If
<strong class="program">Universal Feed Parser</strong> recognizes the namespace, it will use the
namespace’s preferred prefix to construct the variable name. It will also list
the namespace in the <tt class="docutils literal"><span class="pre">namespaces</span></tt> dictionary using the namespace’s preferred
prefix.</p>
<p>In the previous example, the namespace
(<a class="reference external" href="http://prismstandard.org/namespaces/1.2/basic/">http://prismstandard.org/namespaces/1.2/basic/</a>) was defined with the
namespace’s preferred prefix (prism), so the prism:issn element was accessible
as the variable <tt class="docutils literal"><span class="pre">d.feed.prism_issn</span></tt>. However, if the namespace is defined
with a non-standard prefix, <strong class="program">Universal Feed Parser</strong> will still
construct the variable name using the preferred prefix, <em>not</em> the actual prefix
that is used in the feed.</p>
<p>This will become clear with an example.</p>
</div>
<div class="section" id="accessing-namespaced-elements-with-non-standard-prefixes">
<h2>Accessing namespaced elements with non-standard prefixes<a class="headerlink" href="#accessing-namespaced-elements-with-non-standard-prefixes" title="Permalink to this headline">¶</a></h2>
<div class="highlight-python"><pre>>>> import feedparser
>>> d = feedparser.parse('http://feedparser.org/docs/examples/nonstandard_prefix.rdf')
>>> d.feed.prism_issn
u'0028-0836'
>>> d.feed.foo_issn
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "feedparser.py", line 158, in __getattr__
raise AttributeError, "object has no attribute '%s'" % key
AttributeError: object has no attribute 'foo_issn'
>>> d.namespaces
{'': u'http://purl.org/rss/1.0/',
'prism': u'http://prismstandard.org/namespaces/1.2/basic/',
'rdf': u'http://www.w3.org/1999/02/22-rdf-syntax-ns#'}</pre>
</div>
<p>This is the complete list of namespaces that <strong class="program">Universal Feed Parser</strong>
recognizes and uses to construct the variable names for data in these
namespaces:</p>
<table border="1" class="docutils">
<colgroup>
<col width="22%" />
<col width="78%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Prefix</th>
<th class="head">Namespace</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td>admin</td>
<td><a class="reference external" href="http://webns.net/mvcb/">http://webns.net/mvcb/</a></td>
</tr>
<tr class="row-odd"><td>ag</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/aggregation/">http://purl.org/rss/1.0/modules/aggregation/</a></td>
</tr>
<tr class="row-even"><td>annotate</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/annotate/">http://purl.org/rss/1.0/modules/annotate/</a></td>
</tr>
<tr class="row-odd"><td>audio</td>
<td><a class="reference external" href="http://media.tangent.org/rss/1.0/">http://media.tangent.org/rss/1.0/</a></td>
</tr>
<tr class="row-even"><td>blogChannel</td>
<td><a class="reference external" href="http://backend.userland.com/blogChannelModule">http://backend.userland.com/blogChannelModule</a></td>
</tr>
<tr class="row-odd"><td>cc</td>
<td><a class="reference external" href="http://web.resource.org/cc/">http://web.resource.org/cc/</a></td>
</tr>
<tr class="row-even"><td>co</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/company">http://purl.org/rss/1.0/modules/company</a></td>
</tr>
<tr class="row-odd"><td>content</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/content/">http://purl.org/rss/1.0/modules/content/</a></td>
</tr>
<tr class="row-even"><td>cp</td>
<td><a class="reference external" href="http://my.theinfo.org/changed/1.0/rss/">http://my.theinfo.org/changed/1.0/rss/</a></td>
</tr>
<tr class="row-odd"><td>creativeCommons</td>
<td><a class="reference external" href="http://backend.userland.com/creativeCommonsRssModule">http://backend.userland.com/creativeCommonsRssModule</a></td>
</tr>
<tr class="row-even"><td>dc</td>
<td><a class="reference external" href="http://purl.org/dc/elements/1.1/">http://purl.org/dc/elements/1.1/</a></td>
</tr>
<tr class="row-odd"><td>dcterms</td>
<td><a class="reference external" href="http://purl.org/dc/terms/">http://purl.org/dc/terms/</a></td>
</tr>
<tr class="row-even"><td>email</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/email/">http://purl.org/rss/1.0/modules/email/</a></td>
</tr>
<tr class="row-odd"><td>ev</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/event/">http://purl.org/rss/1.0/modules/event/</a></td>
</tr>
<tr class="row-even"><td>feedburner</td>
<td><a class="reference external" href="http://rssnamespace.org/feedburner/ext/1.0">http://rssnamespace.org/feedburner/ext/1.0</a></td>
</tr>
<tr class="row-odd"><td>fm</td>
<td><a class="reference external" href="http://freshmeat.net/rss/fm/">http://freshmeat.net/rss/fm/</a></td>
</tr>
<tr class="row-even"><td>foaf</td>
<td><a class="reference external" href="http://xmlns.com/foaf/0.1/">http://xmlns.com/foaf/0.1/</a></td>
</tr>
<tr class="row-odd"><td>geo</td>
<td><a class="reference external" href="http://www.w3.org/2003/01/geo">http://www.w3.org/2003/01/geo</a>/wgs84_pos#</td>
</tr>
<tr class="row-even"><td>icbm</td>
<td><a class="reference external" href="http://postneo.com/icbm/">http://postneo.com/icbm/</a></td>
</tr>
<tr class="row-odd"><td>image</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/image/">http://purl.org/rss/1.0/modules/image/</a></td>
</tr>
<tr class="row-even"><td>itunes</td>
<td><a class="reference external" href="http://example.com/DTDs/PodCast-1.0.dtd">http://example.com/DTDs/PodCast-1.0.dtd</a></td>
</tr>
<tr class="row-odd"><td>itunes</td>
<td><a class="reference external" href="http://www.itunes.com/DTDs/PodCast-1.0.dtd">http://www.itunes.com/DTDs/PodCast-1.0.dtd</a></td>
</tr>
<tr class="row-even"><td>l</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/link/">http://purl.org/rss/1.0/modules/link/</a></td>
</tr>
<tr class="row-odd"><td>media</td>
<td><a class="reference external" href="http://search.yahoo.com/mrss">http://search.yahoo.com/mrss</a></td>
</tr>
<tr class="row-even"><td>pingback</td>
<td><a class="reference external" href="http://madskills.com/public/xml/rss/module/pingback/">http://madskills.com/public/xml/rss/module/pingback/</a></td>
</tr>
<tr class="row-odd"><td>prism</td>
<td><a class="reference external" href="http://prismstandard.org/namespaces/1.2/basic/">http://prismstandard.org/namespaces/1.2/basic/</a></td>
</tr>
<tr class="row-even"><td>rdf</td>
<td><a class="reference external" href="http://www.w3.org/1999/02/22-rdf-syntax">http://www.w3.org/1999/02/22-rdf-syntax</a>-ns#</td>
</tr>
<tr class="row-odd"><td>rdfs</td>
<td><a class="reference external" href="http://www.w3.org/2000/01/rdf">http://www.w3.org/2000/01/rdf</a>-schema#</td>
</tr>
<tr class="row-even"><td>ref</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/reference/">http://purl.org/rss/1.0/modules/reference/</a></td>
</tr>
<tr class="row-odd"><td>reqv</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/richequiv/">http://purl.org/rss/1.0/modules/richequiv/</a></td>
</tr>
<tr class="row-even"><td>search</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/search/">http://purl.org/rss/1.0/modules/search/</a></td>
</tr>
<tr class="row-odd"><td>slash</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/slash/">http://purl.org/rss/1.0/modules/slash/</a></td>
</tr>
<tr class="row-even"><td>soap</td>
<td><a class="reference external" href="http://schemas.xmlsoap.org/soap/envelope/">http://schemas.xmlsoap.org/soap/envelope/</a></td>
</tr>
<tr class="row-odd"><td>ss</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/servicestatus/">http://purl.org/rss/1.0/modules/servicestatus/</a></td>
</tr>
<tr class="row-even"><td>str</td>
<td><a class="reference external" href="http://hacks.benhammersley.com/rss/streaming/">http://hacks.benhammersley.com/rss/streaming/</a></td>
</tr>
<tr class="row-odd"><td>sub</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/subscription/">http://purl.org/rss/1.0/modules/subscription/</a></td>
</tr>
<tr class="row-even"><td>sy</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/syndication/">http://purl.org/rss/1.0/modules/syndication/</a></td>
</tr>
<tr class="row-odd"><td>szf</td>
<td><a class="reference external" href="http://schemas.pocketsoap.com/rss/myDescModule/">http://schemas.pocketsoap.com/rss/myDescModule/</a></td>
</tr>
<tr class="row-even"><td>taxo</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/taxonomy/">http://purl.org/rss/1.0/modules/taxonomy/</a></td>
</tr>
<tr class="row-odd"><td>thr</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/threading/">http://purl.org/rss/1.0/modules/threading/</a></td>
</tr>
<tr class="row-even"><td>ti</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/textinput/">http://purl.org/rss/1.0/modules/textinput/</a></td>
</tr>
<tr class="row-odd"><td>trackback</td>
<td><a class="reference external" href="http://madskills.com/public/xml/rss/module/trackback/">http://madskills.com/public/xml/rss/module/trackback/</a></td>
</tr>
<tr class="row-even"><td>wfw</td>
<td><a class="reference external" href="http://wellformedweb.org/CommentAPI/">http://wellformedweb.org/CommentAPI/</a></td>
</tr>
<tr class="row-odd"><td>wiki</td>
<td><a class="reference external" href="http://purl.org/rss/1.0/modules/wiki/">http://purl.org/rss/1.0/modules/wiki/</a></td>
</tr>
<tr class="row-even"><td>xhtml</td>
<td><a class="reference external" href="http://www.w3.org/1999/xhtml">http://www.w3.org/1999/xhtml</a></td>
</tr>
<tr class="row-odd"><td>xlink</td>
<td><a class="reference external" href="http://www.w3.org/1999/xlink">http://www.w3.org/1999/xlink</a></td>
</tr>
<tr class="row-even"><td>xml</td>
<td><a class="reference external" href="http://www.w3.org/XML/1998/namespace">http://www.w3.org/XML/1998/namespace</a></td>
</tr>
</tbody>
</table>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last"><strong class="program">Universal Feed Parser</strong> treats namespaces as case-insensitive to
match the behavior of certain versions of <strong class="program">iTunes</strong>.</p>
</div>
<div class="admonition warning">
<p class="first admonition-title">Warning</p>
<p class="last">Data from namespaced elements is not <a class="reference internal" href="html-sanitization.html#advanced-sanitization"><em>sanitized</em></a>
(even if it contains <abbr title="HyperText Markup Language">HTML</abbr> markup).</p>
</div>
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<ul>
<li><a class="reference internal" href="#">Namespace Handling</a><ul>
<li><a class="reference internal" href="#accessing-namespaced-elements">Accessing namespaced elements</a></li>
<li><a class="reference internal" href="#accessing-namespaced-elements-with-non-standard-prefixes">Accessing namespaced elements with non-standard prefixes</a></li>
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