PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Facebook, Google and Twitter are all trying to make their accounts a form of ID. But these are issued without verification, so pseudonyms are rife and impersonation easy.
http://www.w3.org/ns/prov#wasQuotedFrom
  • businessinsider.com