PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • About shales, tar sands and other sources - the key term here is EROI - energy return on investment.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wincustomize.com