| http://www.w3.org/ns/prov#value | - If there are requirements set out in laws and/or regulations or stringent criteria used by the producer or the industry that the producer is a part of on quality, loss control, etc., then it suggests that the intent is that the substance or mixture is a product rather than a waste or recyclable material.Another factor is the consistency and homogeneity of the substance or mixture being produced.
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