<http://schema.org/description>
"The realtime web communication platform App.net has launched its latest addition to the developer API: a private messaging API. The new API has a host of features including both chatroom ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/dd/2012/12/13/app-net-adds-private-messaging-api-with-support-for-chatrooms-group-texting-and-more/>