PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • CNET Facebook gave a couple of examples of messages that might count as relevant and worth paying for: ???This test is designed to address situations where neither social nor algorithmic signals are sufficient.
http://www.w3.org/ns/prov#wasQuotedFrom
  • adweek.com