| http://www.w3.org/ns/prov#value | - By way of nonlimiting example, the transparent upper layer 12 may be a glass layer comprised of materials such as conventional glass, solar glass, high-light transmission glass with low iron content, standard light transmission glass with standard iron content, anti-glare finish glass, glass with a stippled surface, fully tempered glass, heat-strengthened glass, annealed glass, or combinations the
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