The current version of the RSS 2.0 specification is here:
http://www.rssboard.org/rss-specification
I wrote a tutorial a few years ago on how to take MySQL records and publish them as an RSS 2.0 feed using PHP. That’s one way to get the data out as a feed:
http://www.cadenhead.org/workbench/stories/2004/05/22/publish-mysql-data-in-rss.html
