PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Most get information from a wide variety of sources including newspapers, books, periodicals, scientific and trade journals, forecasts, interviews with subject matter experts, electronic media, arts and cultural trends, to name only a few.
http://www.w3.org/ns/prov#wasQuotedFrom
  • profuturists.org