PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Two basic factors which are especially prevalent in typical producing oil and gas wells in the Gulf of Mexico and the surrounding coastal regions have created the need for a new plugging technique.
http://www.w3.org/ns/prov#wasQuotedFrom
  • patents.com