<http://schema.org/description>
"It's beyond question that Twitter is an absolutely dominant force in online social networks. along with Facebook, it has emerged as one of the clear winners of the race to capture users ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/twitter/2011/06/08/with-ios-integration-twitter-just-scored-an-immortality-clause/>