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...9;, and to alter the object so that 'is(object, class2)' is identical to 'value'. I much more like how setAs is implemented, we cast _from_ _to_ and so the arguments in all this functions are named. Its much more consistent. I would also suggest to replace the keyword _def_ in the setAs function by _coerce_ as it is in the setIs function. I thinke it will be nicer if bot methods will have a unified user interface if possible. Of corse it may be that this is not possible for reasons not known to me. In this case sorry. /E -- Dipl. bio-chem. Witold Eryk Wolski...