PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • If variations in the prices of such commodities as wheat, rye, cotton, coal, and iron are given the same significance as variations in the prices of such commodities as pepper, opium, diamonds, or nickel, then the establishment of the tabular standard would have the effect of making the content of long-term contracts even more uncertain than at present.
http://www.w3.org/ns/prov#wasQuotedFrom
  • econlib.org