PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Level 1 - observable inputs such as quoted prices in active markets; Level 2 - inputs, other than the quoted market prices in active markets, which are observable, either directly and/or indirectly; and Level 3 - unobservable inputs for the asset or liability in which little or no market data exists, therefore requiring an entity to develop its own assumptions.
http://www.w3.org/ns/prov#wasQuotedFrom
  • theglobeandmail.com