Dave Johnson on open web technologies, social software and Java
Is it this http://cyber.law.harvard.edu/rss/rss.html, promoted by Dave Winer?
This http://www.rssboard.org/rss-specification, from the RSS advisory board?
Or one of the other dozen or so incompatible formats.
It doesn't really matter. There's only one Atom: RFC-4287.
Hat tip to Sam Ruby.