<http://schema.org/url>
<http://thenextweb.com/apple/2012/01/19/apples-new-textbooks-are-live-and-you-can-get-them-right-now/>
<http://thenextweb.com/apple/2012/01/19/apples-new-textbooks-are-live-and-you-can-get-them-right-now/>