PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Reports, memos, planning documents, and other document or electronic communications that are archived and work through normal business channels are considered formal communications.Informal communications are often unofficial and spontaneous.
http://www.w3.org/ns/prov#wasQuotedFrom
  • enotes.com