Mark Pilgrim summarizes his research into RSS compatibility:
“There are 9 versions of RSS, all of which are incompatible with various other versions. RSS 0.90 is incompatible with Netscapeís RSS 0.91, Netscapeís RSS 0.91 is incompatible with Userlandís RSS 0.91, Netscapeís RSS 0.91 is incompatible with RSS 1.0, Userlandís RSS 0.91 is incompatible with RSS 0.92, RSS 0.92 is incompatible with RSS 0.93, RSS 0.93 is incompatible with RSS 0.94, RSS 0.94 is incompatible with RSS 2.0, and RSS 2.0 is incompatible with itself.”
Not a pretty picture. However, the news aggregator vendors seem to have dealt with the mess. The incompatibiblity story must be an interesting one.
