PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • For those fuel cells that use a gas such as hydrogen as their fuel, local generation of the gas is desirable, and may be significantly safer than storing a quantity of gas.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.co.uk