PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • By way of example, a status may specify an action such as accept, reject, hold, score, or ignore, and each of the keys of an email message may be associated with the same status or different statuses.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com