<http://schema.org/description>
"After 5 years,\u00A0AddThis is now the largest content sharing platform on the web with over 10 million websites using it. AddThis compiles sharing analytics over the course of its use ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/socialmedia/2011/10/11/how-and-when-the-world-shares-socially-according-to-addthis-infographic/>