PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • By ceramic I mean not only the usual ceramics such as alumina, zirconia, beryllia, mullite, cordierite, silicon carbide; but also quartz, intermetallics, diamond, boron, graphite, carbon, silicon, and various other carbides, nitrides, aluminides, or borides; glasses, machinable glasses, Corning's Vision glass; and the surface of many metals, particularly reactive metals such as aluminum, magnesium
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com