PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • There does not appear to be a simple answer to this question, though there are a number of numeric approximations, e.g.:
http://www.w3.org/ns/prov#wasQuotedFrom
  • stackoverflow.com