PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Due to the disparity between the architecture and addressing protocols utilized by traditional public switch telephone networks, i.e. a circuit-switched telephone network, and the Internet, i.e. a packet-switched data network, it has been previously difficult to establish a real-time communication link between a user exploring a website with a browser and an actual human operator.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com