PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • These systems permit the use of surfactant flooding processes in formations containing from 500 to 12,000 parts per million polyvalent ions such as calcium and magnesium.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com