<http://schema.org/description>
"In the inaugural study released by app analytics firm, App Annie Intelligence, data shows that, worldwide, the Apple store is seeing revenues four times larger than the Google Play ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/insider/2012/11/29/google-plays-revenue-rises-by-311-but-apples-app-store-sees-4-times-more-sales-study-says/>