<http://schema.org/description>
"Canadian photo-sharing platform 500px has relaunched one of its most popular features: Flow --\u00A0a photo stream based on the actions of your 500px friends, where users can like, favorite, ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2013/10/31/500px-rolls-out-revamped-photo-stream-feature-to-all-users-with-bigger-photos-and-inline-actions/>