PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The consolidated hard materials of this invention may be used to form a variety of wear and cutting components in such tools as roller cone or ???rock??? bits, percussion or hammer bits, drag bits, and a number of different cutting and machine tools.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com