PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Messages may be identified by callout 326, which may indicate whether a message is a voicemail message (i.e., a telephone number is displayed), a text message (some of the introductory text or the identification of the sender (i.e., sender's handle or username) is shown), a picture, or the like.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com