PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Conventional packers are also typically installed using cement or other materials pumped into an inflatable sealing element. [0007] During the production of a well, downhole devices are often controlled or otherwise in communication with above-ground equipment.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com.au