This is an unnofficial document: please read the disclaimer.
The RSS 2.0 specification is available. "RSS is a Web content syndication format. Its name is an acronym for Really Simple Syndication. RSS is dialect of XML. All RSS files must conform to the XML 1.0 specification, as published on the World Wide Web Consortium (W3C) website.[...] This document represents the status of RSS as of the Fall of 2002."
Aggie is the first aggregator to support RSS 2.0.
This stylesheet, written by Sjoerd Visscher, allows one to convert a vanilla RSS 2.0 feed into RDF.
DISCLAIMER: This document is not endorsed by Dave Winer, UserLand, or any its associates in any way. Publication of this document does not imply any kind of connection, endorsement, or comment on the nature of RSS 2.0. For the definitive word on Dave Winer and UserLand's RSS 2.0, try backend.userland.com.