RSS Versions
RSS has a sordid history. Different people and groups have largely unilaterally created specifications that they called RSS. Some RSS formats are XML-based formats. And some RSS formats are RDF-based formats.
The list below is of all known RSS versions. They are listed in chronological order of when they were released.
NOTE: In the list below, although RSS 1.0 seems to be out of place, it is actually in the correct place chronologically.
NOTE: There are 3 different versions of RSS 0.91. Netscape's RSS 0.91 (Revision 1), Netscape's RSS 0.91 Revision 3 and Userland's RSS 0.91.
NOTE: RSS 0.93 and RSS 0.94 were only ever released as "drafts" and never became "final" and thus were not meant to actually be used.
| Name | Status | Release Date | Based On | Author |
|---|---|---|---|---|
| RSS 0.90 | March 1999 | RDF | Netscape | |
| Netscape's RSS 0.91 (Revision 1) | ? | XML | Netscape | |
| Netscape's RSS 0.91 Revision 3 | July 10, 1999 | XML | Netscape | |
| Userland's RSS 0.91 | June 4, 2000 | XML | Userland | |
| RSS 1.0 | Standard | December 9, 2000 | RDF | RSS-DEV Working Group |
| RSS 0.92 | December 25, 2000 | XML | Userland | |
| RSS 0.93 | April 20, 2001 | XML | Userland | |
| RSS 0.94 | August 19, 2002 | XML | Userland | |
| RSS 2.0 | September 2002 | XML | Userland | |
| RSS 2.0 (post 2002-11-11) | November 11, 2002 | XML | Userland | |
| RSS 2.0 (post 2003-01-21) | Standard | January 21, 2003 | XML | Userland |