<http://schema.org/interactionType>
"http://schema.org/ShareAction"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/asia/2013/07/24/chinas-sina-weibo-incorporates-facebook-registration-as-it-targets-overseas-users/sinaweibotaiwanfacebookbar/>