| http://www.w3.org/ns/prov#value | - It may, for example, be on the order of 0.5 to 1.0 mil thick and comprise a suitable polymeric material such as polyurethane, Saran (trademark of Dow Chemical), a polyolefin such as polyethylene or polypropylene, a polyester such as polyethylene terephthalate, etc.
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