PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Hence, the service providers may use such unified communications systems across multiple platforms, independent of protocol, for storage of various types of messages, for example voice messages, facsimile, and e-mail stored in a centralized messaging store.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com