PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • A number of the questions here will help you decide whether or not a poll is a "scientific one worthy of coverage ??? or an unscientific survey without value.
http://www.w3.org/ns/prov#wasQuotedFrom
  • ncpp.org