PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Since then, Facebook has experimented with other programs for selling real-world ???gifts??? ??? including flowers, chocolate and other items ??? that Facebook members can have delivered to their friends, and even a Facebook gift card that allowed members to give their friends the equivalent of a gift certificate for certain retailers.
http://www.w3.org/ns/prov#wasQuotedFrom
  • siliconbeat.com