The RSS Blog

Google has prepared a cool list of the most common RSS extentions used in feeds they are tracking for Google Reader. I'll publish the same data for Rmail tomorrow.

• 29.36%   Dublin Core   http://purl.org/dc/elements/1.1/
• 15.71%  XHTML  http://www.w3.org/1999/xhtml
• 11.92%  Blogger Atom API Extensions  http://www.blogger.com/atom/ns#
• 11.88%  Blogger Draft Extension  http://purl.org/atom-blog/ns#
• 11.16%  RSS 1.0 Content Module  http://purl.org/rss/1.0/modules/content/
• 8.39%  Well-Formed Web Comment API  http://wellformedweb.org/CommentAPI/
• 5.35%  MetaVocab  http://webns.net/mvcb/
• 3.85%  FeedBurner Extensions  http://rssnamespace.org/feedburner/ext/1.0
• 3.74%  MSN Spaces  http://schemas.microsoft.com/msn/spaces/2005/rss
• 3.66%  Slash  http://purl.org/rss/1.0/modules/slash/

http://googlereader.blogspot.com/2006/08/namespaced-extensions-in-feeds.html

Update: Here's a list of common extensions in Rmail's 17166 RSS 2.0 feeds.

1. dc:creator 4137
2. atom:* 2306 << atom:link[@self]
3. atom:link[@self] 2214 << FeedBurner
4. content:encoded 2107
5. slash:* 1230
6. dc:date 968
7. trackback:* 587
8. itunes:* 493
9. sle:* 480
10. cc:* 472
11. mrss:* 204
12. xhtml:* 52
13. blogChannel:* 35

http://www.r-mail.org/blog/?guid=20060804071646