Webmonkey: authoring: Mighty Atom: Really Similar Syndication? "So then, why do we need Atom, again?
Dave Winer's RSS spec is penned in a succinct, conversational style that's both easy to read and easy to learn. Yet while brevity and informality work great when it comes to getting the masses to adopt new ideas, the spec had some notable gaps and gray areas. And late efforts to re-write or repair the RSS spec were hampered by a variety of issues, such as RSS's emphasis on backwards compatibility and its adoption of a Creative Commons license."