<http://schema.org/topics>
"airport utility,Apps and Software,features,gallery,Grand Theft Auto 3,HBO GO,Infinity Blade 2,instacast,iOS apps,iPhone Apps,mixel,Mobile,songza,Super 8,Tech,trending,Trending Small Bottom,tweetbot,Uncategorized,welder,Year End 2011"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2011/12/30/top-10-ios-apps-2011/>