<http://schema.org/description>
"Mobile messengers are all the rage now. That and stickers. But most of us still spend plenty of time at our computers, so being able to message across PC and mobile platforms is a feature ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2013/09/14/6-cross-platform-messaging-services-that-work-from-desktop-to-mobile/facebookmessenger-2/>