PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The introduction and emphasis on newer signals, such as social networking sites and location, have really raised the stakes for search marketers.???In February, Google said it would begin integrating information from social networking sites such as Twitter and Quora into a search algorithm.
http://www.w3.org/ns/prov#wasQuotedFrom
  • dmnews.com