| http://www.w3.org/ns/prov#value | - thylsulfonate (triflate), benzylsulfonate or phenylsulfonate unsubstituted or substituted by C1 -C4 alkyl, C1 -C4 alkoxy or halogen, especially fluorine, chlorine or bromine, for example tosylate, mesylate, brosylate, p-methoxy- or p-ethoxyphenylsulfonate, pentafluorophenylsulfonate or 2,4,6-triisopropylsulfonate.
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