Mark Pilgrim: RSS 2.0
Mark Pilgrim: “RSS 2.0 does not exist yet. It is the code name for a proposed merging of the RSS 0.9x and RSS 1.0 branches. [It] is an attempt to maintain a core of simplicity (the greatest strength of RSS 0.9x) while allowing for the extensibility of decentralized module development (the greatest strength of RSS 1.0).”