<http://schema.org/description>
"US telecommunications behemoth AT&amp;amp;amp;T is set to launch a new push-to-talk (PTT) app for the iPhone, making its existing enhanced PTT service available to millions more corporate ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/mobile/2013/06/10/att-plans-the-first-ever-push-to-talk-iphone-app-for-the-us-market/>