<http://schema.org/description>
"Earlier today Google announced its Knowledge Graph product, which it says will allow users to get information about things, people or places, instantly. It's essentially an enhancement ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/google/2012/05/16/googles-knowledge-graph-shows-it-doesnt-just-want-you-to-search-it-wants-you-to-stay/>