Re: Miscellaneous Mathematical Symbols-A

> If I'm unnecessarily dismissive, how about the Unicode conformance 
> requirements:
> 
> "C3  A process shall not interpret an unassigned code point as an 
> abstract character."

True enough. But...

> This is still about proposed characters,

Actually, not. The characters that Jeroen was asking about,
and which Asmus commented on in the context of the STIX font
encoding, were "proposed" long ago.

At this point, they are:

1. Officially approved by the UTC for addition to a future
   version of the standard, and that version of the standard
   has also been designated now as Version 5.1 and is further in
   its release process (which takes considerable time and
   has a number of further checkpoints and milestones to go).
   
2. Officially approved by SC2 for balloting in amendments to
   10646, and now past the two technical approval ballots
   in SC2.
   
3. Currently in FDAM ballot in ISO, which is a non-technical
   approval ballot at the JTC1 level, allowing no technical
   changes in content.
   
What remains true right now is that ITTF hasn't yet published
Amendment 3 (for 27EC..27ED) or Amendment 4 (for 27CC, 27EE..27EF),
pending processing after the completion of what will be the
pro forma FDAM ballotting. So they aren't yet officially
part of the International Standard.

And they haven't been published yet by the Unicode Consortium
as part of a completed Unicode version release, either. That
won't happen until late March, 2008, by current plans.

> I don't see how it would hurt to keep things clear: they are now 
> non-Unicode characters, which can be represented in Unicode data by 
> private agreements; if and when a new version of the standard containing 
> them has been approved, they become Unicode characters that should be 
> encoded as indicated, and hence existing data containing them should be 
> recoded. It's after all a straightforward operation, needed for limited 
> amount of data only. Fonts will need similar adjustments.

This is a little too "letter of the law" for practical
implementations.

What you can't do today is formally claim conformance to
the Unicode Standard, Version 5.1, because it hasn't yet
been published.

But if you are rolling out major implementation upgrades --
and that includes such things as a major font update like the
STIX fonts -- then you can't wait until March 31, 2008 to
actually start using the newly added code points.

I'd wager that *most* major implementers have already started
to use Unicode 5.1 code points in internal development of
projected software releases, and some of that is going to
start leaking out publicly well before the checkered flag
on March 31.

This is actually a very familiar drill -- it is the same kind
of thing that has been going on for years for every Unicode
major and minor release.

Of course, anybody is obviously still free to refuse to recognize
any of the new characters until formal publication of the
amendments to 10646 and of Version 5.1 of the Unicode Standard.

--Ken