PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • What could be more relevant for the query Jessica Simpson than a page that says Jessica Simpson 100 times? (Clever SEOs will realize the answer is a page that says Jessica Simpson 101 times.) This metric, called keyword density, was quickly manipulated, and the search engines of the time diluted the power of this metric on rankings until it became almost useless.
http://www.w3.org/ns/prov#wasQuotedFrom
  • blogspot.com