| http://www.w3.org/ns/prov#value | - in which m denotes 2 or 3 and B is as defined under (e) when w=0; ##STR10## in which n is as defined under (a), w denotes 0 or 1 and u and B are as defined under (e); ##STR11## in which M denotes a hydrogen atom, an ammonium group or an alkali metal, such as lithium, sodium or potassium, and u and w, which are identical or different, denote 0 or 1; ##STR12## in which M is as defined under (h); ##S
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