<http://schema.org/description>
"One of the biggest trends we've seen on the Web in the past year has been the growing &amp;quot;Gamification&amp;quot; of websites and online services. From Foursquare to Get Glue and and services ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/socialmedia/2011/01/11/as-websites-become-games-understand-the-trend-with-the-gamification-encyclopedia/>