PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Also, the definitions of ???oil??? differ from source to source: Some count only conventional crude plus lease condensates, while others will include natural gas liquids and unconventional sources such as synthetic oil made from Canadian tar sands, biofuels, and other liquids.
http://www.w3.org/ns/prov#wasQuotedFrom
  • peak-oil.org