PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Most large agencies will typically push a client to use paid links, a strategy that is heavily discouraged by engines such as Google.
http://www.w3.org/ns/prov#wasQuotedFrom
  • searchenginewatch.com