Prohibiting mapping of PVALID characters

Cary Karp ck at
Fri Dec 11 10:16:31 CET 2009

> So unless the protocol document defines "mapping" somehow
> more restrictively to mean "the kinds of mappings we don't
> want in the protocol, i.e., case mappings, *compatibility*
> normalization mappings, etc., as opposed to the kinds
> of mappings we *require* in the protocol, i.e. *canonical*
> normalization mappings", I see this as just introducing
> more potential for confusion in the protocol statement.

What happens if we take a first cut at recognizing this by adding 
something along the lines of "... no mapping of PVALID characters 
(except for the changes implicit in NFC normalization) ..." wherever 


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