PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • messages including at least one message selectable by a user; a reply command that, upon selection by the user, generates a reply message to a sender of the selected message and a recipient of a message related to the selected message, wherein the recipient is neither a recipient of the selected message nor the sender of the selected message. 13.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com