<http://schema.org/description>
"One lucky Twitter user has noticed some changes to his Twitter stream.\r\n\r\nAccording to his post, Twitter has made more changes to its Timeline feature, which is your stream of incoming ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/twitter/2011/10/26/twitter-provides-more-context-for-tweets-on-your-timeline/>