PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • One or more deviated or generally horizontal wellbores may be drilled from single generally vertical wellbore to provide wellbores which: (a) reach irregular reservoirs without additional wells being drilled from the surface, (b) limit the invasion of unwanted formation fluids, (c) penetrate natural vertical fractures and (d) improve production from various types of formations or reservoirs.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com