<http://schema.org/description>
"NOTE: Since this post was published, we've been informed that it's actually an Atom feed, rather than RSS. Still, that's but a technicality. As long as your reader supports Atom as ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2011/07/13/follow-any-google-account-using-rss/>