From: Mark Davis (mark.davis@icu-project.org)
Date: Sun Jan 21 2007 - 18:47:21 CST
As Eric said, this is already provided for.
1. There are already 66 code points available for process-internal
use, called noncharacters (see below)
2. It would be backwards incompatible for the consortium to make ANY
change in PUA characters. There is, IMO, essentially zero chance of this
happening. So it is not worth discussing any further.
3. If someone really wanted to propose additional noncharacter code
points, on the other hand, that is certainly possible. (And as a reminder,
NO proposal that is circulated on this list is taken up by the UTC unless a
written proposal is submitted to
http://www.unicode.org/reporting.html(or by unicode members via
internal mechanisms).) One would have to make a
very good case for the need, however.
FDD0..FDEF # Cn[32] FFFE..FFFF #Cn [2] 1FFFE..1FFFF #Cn [2] 2FFFE..2FFFF #Cn[2]
3FFFE..3FFFF #Cn [2] 4FFFE..4FFFF #Cn [2] 5FFFE..5FFFF #Cn [2] 6FFFE..6FFFF#
Cn [2] 7FFFE..7FFFF #Cn [2] 8FFFE..8FFFF #Cn [2] 9FFFE..9FFFF #Cn [2]
AFFFE..AFFFF #Cn [2] BFFFE..BFFFF #Cn [2] CFFFE..CFFFF #Cn [2] DFFFE..DFFFF#
Cn [2] EFFFE..EFFFF #Cn [2] FFFFE..FFFFF #Cn [2] 10FFFE..10FFFF #Cn [2]
Mark
On 1/21/07, Eric Muller < emuller@adobe.com> wrote:
>
> Ruszlan Gaszanov wrote:
> > So, why don't we split the PUA into character-PUA (reserved for
> representing non-standard characters) and non-character-PUA (reserved for
> process-internal uses)?
> This problem is already solved, using noncharacters: the last two
> characters of each plane and U+FDD0..U+FDEF. See TUS 5, section 16.7,
> page 549, or TUS 4, section 15.7, page 398.
>
> Eric.
>
>
>
-- Mark
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