PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Obviously the more traffic a phrase produces, the more sites will want to target it. (Likely because the majority of site owners still think in terms of traffic rather than sales.) The most people there are trying to rank for a phrase, the more likely it is that at least some of them have a lot of search engine optimization experience under their belts.
http://www.w3.org/ns/prov#wasQuotedFrom
  • searchengineguide.com