PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • What this turned out to be, for me, was a reference to a CAS server that had recently been removed, in the databases' RPCClientAccessServer property. (As a bit of background, Exchange is new in my environment, and I had set up Exchange with some 'test' hostnames.
http://www.w3.org/ns/prov#wasQuotedFrom
  • serverfault.com