title: Extending RSS format with more fields?
body: <p>I have a website that I need to create an RSS feed for. Is there a standard format for adding custom fields to an RSS feed? I would like to add a "location" element to my RSS feeds for example. I have some partners that would like to consume the feeds and be able to use the custom fields specific to my website.</p>
  
  <p>For the current RSS 2.0 format, these are the included fields available from the RSS 2.0 specifications:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8" ?&gt;
  &lt;rss version="2.0"&gt;
    &lt;channel&gt;
      &lt;title&gt;RSS Example&lt;/title&gt;
      &lt;description&gt;This is an example of an RSS feed&lt;/description&gt;
      &lt;link&gt;http://www.domain.com/link.htm&lt;/link&gt;
      &lt;lastBuildDate&gt;Mon, 28 Aug 2006 11:12:55 -0400 &lt;/lastBuildDate&gt;
      &lt;pubDate&gt;Tue, 29 Aug 2006 09:00:00 -0400&lt;/pubDate&gt;
      &lt;language&gt;en-us&lt;/language&gt;
      &lt;copyright&gt;Copyright 2002, Spartanburg Herald-Journal&lt;/copyright&gt;
      &lt;managingEditor&gt;geo@herald.com (George Matesky)&lt;/managingEditor&gt;
      &lt;webMaster&gt;betty@herald.com (Betty Guernsey)&lt;/webMaster&gt;
      &lt;category&gt;Newspapers&lt;/category&gt;
      &lt;generator&gt;MightyInHouse Content System v2.3&lt;/generator&gt;
      &lt;docs&gt;http://blogs.law.harvard.edu/tech/rss&lt;/docs&gt;
      &lt;image&gt;
        &lt;title&gt;Something&lt;/title&gt;
        &lt;url&gt;http://something.com/image.jpg&lt;/url&gt;
        &lt;link&gt;http://something.com&lt;/link&gt;
        &lt;description&gt;This is something&lt;/description&gt;
      &lt;/image&gt;
      &lt;rating&gt;(PICS-1.1 "http://www.classify.org/safesurf/" l r (SS~~000 1))&lt;/rating&gt;
      &lt;item&gt;
        &lt;title&gt;Item Example&lt;/title&gt;
        &lt;description&gt;This is an example of an Item&lt;/description&gt;
        &lt;link&gt;http://www.domain.com/link.htm&lt;/link&gt;
        &lt;guid&gt; 1102345&lt;/guid&gt;
        &lt;pubDate&gt;Tue, 29 Aug 2006 09:00:00 -0400&lt;/pubDate&gt;
        &lt;author&gt;lawyer@boyer.net (Lawyer Boyer)&lt;/author&gt;
        &lt;category&gt;Grateful Dead&lt;/category&gt;
        &lt;comments&gt;http://www.myblog.org/cgi-local/mt/mt-comments.cgi?entry_id=290&lt;/comments&gt;
        &lt;enclosure url="http://www.scripting.com/mp3s/weatherReportSuite.mp3" length="12216320" type="audio/mpeg" /&gt;
        &lt;source url="http://www.tomalak.org/links2.xml"&gt;Tomalak's Realm&lt;/source&gt;
      &lt;/item&gt;
    &lt;/channel&gt;
  &lt;/rss&gt;
  </code></pre>
  
  <p>What if I wanted to add more elements to make them available for partners so they can consume and parse them as they please? At the same time, I do not want to break RSS readers if they add my RSS feed to it. Any idea on the best way to handle this?</p>