<http://schema.org/topics>
"discover,features,Gadgets,Mashable,mastercard,Mobile,Mobile contactless payments,Money and Finance Lists,near field communication,NFC,NXP,Social Media,Tech,news,trending,Visa"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2010/12/15/smartphone-wallet/>