<http://schema.org/topics>
"Blicki,blogging,BuddyPress,chat room,contact manager,Lists,newsletter manager,San Francisco-San Jose,social network,task manager,web,web 2.0,wiki,word processor,WordPress"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2008/09/26/wordpress-weirdest-uses/>