PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The metal catalysts, such as Ni, Pd, Pt, Fe, Ru, Os, Co, Rh, Ir, Cu, Ag, Au, Zn, Cd, Mn, Tc, Re, Cr, Mo, W, V, Nb, Ta, Ti, Zr Hf, Sc, Y, La, and related alloys, compounds or composite films.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com