<http://schema.org/topics>
"bing,Facebook,features,Flipboard,Future of Search Series,Google,instant personalization,Mashable,my6sense,search,social graph,Social Media,social search,Startups"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2011/03/10/future-of-social-search/>