PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • That is, when drilling is stopped while using a drilling fluid of the invention, and consequently when the stresses or forces associated with drilling are substantially reduced or removed, the drilling fluid acts as a gel, suspending/continuing to suspend drill cuttings and other solids (such as for example weighting materials) for delivery to the well surface.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com