PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The reflective layer preferably is formed of a metal material having a relatively high heat conductivity such as Al, Au, Ag, Cu or the like, especially Au, Ag, Cu, which have a refractive index of less than 0.5 at a wavelength in the 600 nm range, or an alloy material based on these metal materials.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com