<http://schema.org/description>
"Facebook has announced that app developers can now associate app pages with app detail pages via the App Center, which will result in adding &amp;quot;Go to App&amp;quot;/&amp;quot;Play Game&amp;quot; ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/facebook/2012/12/13/facebok-lets-developers-connect-app-pages-to-app-detail-pages/>