| http://www.w3.org/ns/prov#value | - Examples thereof are porous inorganic oxides such as SiO2, Al2O3, MgO, TiO2 and ZrO2, and organic porous polymer such as polystyrene, styrene-divinylbenzene copolymer, styrene-ethylene glycol-methyl dimethacrylate copolymer, polymethylacrylate, polyethylacrylate, methyl acrylate-divinylbenzene copolymer, polymethylmethacrylate, methyl methacrylate-divinylbenzene copolymer, polyacrylonitrile, acryl
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