PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This is particularly true when process requirements demand that the exchanger is made from an expensive material, such as nickel or titanium.
http://www.w3.org/ns/prov#wasQuotedFrom
  • thermopedia.com