PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Whenever system pressure drops below tank pressure, for example when there is a consumption demand or system leakage, the valve 104 opens automatically, permitting fluid stored in the tank 100 to meet the demand within the capacitance limit of the tank 100.
http://www.w3.org/ns/prov#wasQuotedFrom
  • freepatentsonline.com