PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Non-fossil energy sources such as nuclear & wind are fine for making electricity, & off peak power can be used to make hydrogen which can used for most of the same things as methane.
http://www.w3.org/ns/prov#wasQuotedFrom
  • typepad.com