PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Indeed, the great commodities bubble started springing its first leaks two weeks ago: Oil, gold and other major commodities posted their steepest weekly drop in half a century.
http://www.w3.org/ns/prov#wasQuotedFrom
  • barrons.com