<http://schema.org/mainEntityOfPage>
<http://blogs.wsj.com/digits/2010/04/01/app-store-for-ipad-more-than-2300-apps-and-counting/>
<http://blogs.wsj.com/digits/2010/04/01/app-store-for-ipad-more-than-2300-apps-and-counting/?mod=e2tw>