PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • If the help is extended to an industry the produce of which has already been tried and accepted by consumers, it can only appear superfluous: but besides the impropriety of uselessly expending public money, there is also the risk of stimulating the industry beyond bounds, in such a manner as to drive it sometimes to exceed, in its production, the just limit of the demand.
http://www.w3.org/ns/prov#wasQuotedFrom
  • econlib.org