<http://schema.org/topics>
"app store (iOS) ,Apple,iPad,apple lists,features,Financial Times,Gadgets,gallery,ipad apps,ipad lists,Lists,The New York Times,newspapers,Tech,usa today,wall street journal"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2010/10/13/ipad-newspaper-apps/>