<http://schema.org/description>
"500px on Tuesday updated its native iOS app with two big new features soon after passing the 1 million download milestone. iPad users have gained support for Flow, and everyone can ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2013/04/02/after-passing-1m-downloads-500px-releases-faster-ios-app-with-flow-for-ipad-and-support-for-followers/>