PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • ???Synthesis gas??? is defined as a gaseous mixture consisting substantially of hydrogen and carbon monoxide, with lessor quantities of impurities present such as water, carbon dioxide, hydrogen sulfide, carbonyl sulfide, ammonia, and nitrogen.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com