PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The thin film stacks often include materials such as silicon dioxide (SiO2), silicon nitride (Si3N4), dielectrics, metals, metal silicides, metal nitrides or carbides, polycrystalline silicon (Si), amorphous Si, single-crystal Si, silicon germanium (SiGe) alloys or germanium (Ge).
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com