PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • By silicon nitride it is meant a material having silicon-nitrogen (Si???N) bonds, including materials such as silicon oxy-nitride, silicon-oxygen-hydrogen-nitrogen, and other stoichiometric or non-stoichiometric combinations of silicon, nitrogen, oxygen, hydrogen and even carbon.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com