03 Mar 95, Jonathan de Boyne Pollard writes to Peter Hansen:

 >> What possible difference could that make?  Even in routines such as
 >> C's stricmp() "ignoring case" is generally performed by
converting
 >> both compared characters to uppercase for the duration of the
 >> compare.

 >   John is implying that there's not necessarily a one-to-one mapping
 >   between lower and upper case in all character sets.

The normal way of handling that case is to not map the characters that have
no other-case equivalent.  Just like functions like stricmp() are not
supposed to translate characters that aren't alphabetic.  (They don't
always, which is one reason why functions like stricmp() aren't in the ISO
standard for C.)

- Jon

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