<http://schema.org/topics>
"accessories,Apple,iPad,apple lists,cases,cygnett,Etsy,features,Gadgets,griffin technology,ipad accessories,ipad lists,iPhone,iPhone Resource Lists,Lists,Mobile Lists,Tech,uncommon,vers audio"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2010/05/30/matching-iphone-ipad-cases/>