PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This will include some we use already, such as wind, solar, biofuels, and other sources yet to be invented.
http://www.w3.org/ns/prov#wasQuotedFrom
  • chicagotribune.com