PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • I can understand how incredibly useful it can be for the sender, particularly having information such as how long it takes for a person to respond to an email after they open it.
http://www.w3.org/ns/prov#wasQuotedFrom
  • bothsidesofthetable.com