| http://www.w3.org/ns/prov#value | - As the aggregating agent, mention may be made of, for example, halides such as chloride, bromide or iodide, or anions such as acetates, acetoacetates or sulfates, of vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, ruthenium, cobalt, nickel, copper, zinc, cadmium and/or silver; aluminum salts such as aluminum acetate, aluminum polyaluminum chloride and/or aluminum hali
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