PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Gas / Liquid Gas Processing or synthesizing of industrial gases or liquid gases such as argon, nitrogen, oxygen, methane, acetylene, propane or other gas mixtures.
http://www.w3.org/ns/prov#wasQuotedFrom
  • globalspec.com