PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The casing is a permanently-installed pipe for lining the well hole to provide pressure containment and prevent collapse.
http://www.w3.org/ns/prov#wasQuotedFrom
  • integratedequipment.com