PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This technique is an improvement over trying to deliver an acid or other agent from the surface to be distributed at many locations evenly along the wellbore.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com