PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In such cases, steam from a conventional boiler (often called utility or plant steam) is unsuitable because it may contain boiler additives, rust or other undesirable materials.
http://www.w3.org/ns/prov#wasQuotedFrom
  • cleanindiajournal.com