PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • However, when this is done things are nice and simple, showing the friends you have saved as well as their Facebook picture (or other that you have tagged) if you have linked the accounts.However, here is an issue we are not sure why Apple hasn't fixed as yet: contact linking is nigh-on impossible unless you drill right down through the editing menu.
http://www.w3.org/ns/prov#wasQuotedFrom
  • techradar.com