PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • .NET 2.0 introduced nullable types into the CLR which, for the first time, provided the ability for value types to be assigned a null value.
http://www.w3.org/ns/prov#wasQuotedFrom
  • blogspot.com