PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Many advertisers struggle with limited inventory in keyword lists, and because semantic search should allow Google and other engines to better understand the true user intent of a search query, the inventory available to get clicks rises with perhaps only a small ROI hit.
http://www.w3.org/ns/prov#wasQuotedFrom
  • clickz.com