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Jorgen Schaefer <forcer@xxxxxxxxx> writes: > PS. It might be worth the effort to try going through this SRFI > and see whether we can change the specific formulations in a way > that allows an implementation to use ASCII if it wants to, but > also allows for a correct implementation of Unicode if so desired. I believe it was Matthew's intention to allow implementations that have char representations that cover only a subset of the scalar value range---the SRFI document doesn't quite spell that out. (And Matthew will correct me if I'm wrong, I hope.) This specifically allows US-ASCII, ISO 8859-1, and UCS-2-based representations, at least with what's in the current document. These subsets are all closed with respect to the case folding in UnicodeData.txt. I don't know offhand if that's also the case with full Unicode case folding. -- Cheers =8-} Mike Friede, Völkerverständigung und überhaupt blabla