From: Kenneth Whistler (kenw@sybase.com)
Date: Thu Apr 29 2004 - 20:12:43 EDT
Philippe asked:
> can Unicode be updated later to add a case mapping for
> c-stroke, if C-stroke is added later?
Yes.
It is not ideal to proceed this way, but there are a number
of precedents, where a capital letter of a pair was added to
the standard years after the small version.
>
> Aren't case mapping normative properties,
Yes.
> thus subject to the stability policy?
But there is no absolute guarantee that a case mapping will not
change. Go read the stability policy carefully:
http://www.unicode.org/standard/stability_policy.html
Some normative aspects of the standard are immutable (like
code points and character names). Other normative aspects
of the standard *may* change, given evidence of an error
or other necessity.
Addition of a case-pair for a character where only one of the
pair was encoded before is a good example of a "necessity" to
introduce a case mapping where none existed before.
> but the standard should be prudent
> and make an explicit reserve face to its stability policy, so that the
^^^^^^^
[Aside: Philippe, eventually someone has to tell you that "face to"
is not English. What you mean here for "devant" is an explicit exception
"regarding..." ;-)]
> normative case mappings will be allowed to change to include possible a
> future uppercase version, if it is demonstrated that it exists
This is already allowed, so this is not a problem or an issue with
the stability policy.
--Ken
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