As liason with the Unicode Consortium, I report the following.
Regards, Patrik
Begin forwarded message:
From: Rick McGowan <rick(_at_)unicode(_dot_)org>
Date: lör nov 23, 2002 21:12:10 Europe/Stockholm
To: liaisons(_at_)unicode(_dot_)org
Subject: Unicode letter ballot
To members of liaisons organizations:
Clerical errors were found in canonical mappings for 5 Han
compatibility chars in plane 2... There is a letter ballot being
issued to
Unicode members, attached below.
For further information on possible actions resulting from this ballot,
please see the following two pages:
http://www.unicode.org/unicode/uni2errata/UnicodeErrata.html
http://www.unicode.org/Public/UNIDATA/NormalizationCorrections.txt
Regards,
Rick McGowan
Unicode, Inc.
---------------------------------------
BALLOT to decide the correction for five canonical mapping errors in
the
Unicode Character Database.
APPROVE Option A: __
OR
APPROVE Option B: __
___________________________________________
SUMMARY
There are five clear errors have been discovered in the canonical
mappings
for Plane 2 CJK compatibility characters, verified independently by
multiple experts. Those errors are for U+2F868, U+2F874, U+2F91F,
U+2F95F,
and U+2F9BF.
An additional five characters have been determined to have certain
visual
or clerical errors, but these will be handled through annotations to
the
names list.
At UTC 93, the committee approved that a letter ballot be issued to
choose
the appropriate corrective action, either Option A or Option B:
A) Fix the canonical mappings and issue another normalization
corrigendum
with corrected mappings in the Unicode 4.0 time frame, as follows:
Make the following corrections in UnicodeData.txt for 4.0:
Correct canonical mapping for 2F868 from 2136A to 36FC.
Correct canonical mapping for 2F874 from 5F33 to 5F53.
Correct canonical mapping for 2F91F from 43AB to 243AB.
Correct canonical mapping for 2F95F from 7AAE to 7AEE.
Correct canonical mapping for 2F9BF from 4D57 to 45D7.
Add the following entries to NormalizationCorrections.txt:
2F868;2136A;36FC;4.0.0 # Corrigendum 4
2F874;5F33;5F53;4.0.0 # Corrigendum 4
2F91F;43AB;243AB;4.0.0 # Corrigendum 4
2F95F;7AAE;7AEE;4.0.0 # Corrigendum 4
2F9BF;4D57;45D7;4.0.0 # Corrigendum 4
B) Add five new characters with the correct canonical mappings and
deprecate the existing characters with the incorrect mappings, as
follows:
Deprecate 2F868, 2F874, 2F91F, 2F95F, 2F9BF.
Encode 5 new CJK compatibility characters as follows:
2FA1E CJK COMPATIBILITY CHARACTER-2FA1E --> 36FC
2FA1F CJK COMPATIBILITY CHARACTER-2FA1F --> 5F53
2FA20 CJK COMPATIBILITY CHARACTER-2FA20 --> 243AB
2FA21 CJK COMPATIBILITY CHARACTER-2FA21 --> 7AEE
2FA22 CJK COMPATIBILITY CHARACTER-2FA22 --> 45D7
___________________________________________
IMPLICATIONS OF THE TWO OPTIONS:
Implications of Option A.
a. Can be accomplished in Unicode 4.0 timeframe.
b. Requires issuing technical corrigendum 4 for
Unicode and a technical corrigendum for 10646.
c. Impacts normalization stability.
d. Follows precedent of technical corrigendum 3.
Implications of Option B.
a. Deprecates 5 characters and creates 5 duplicates
of them to map correctly.
b. May be problematical to complete in Unicode 4.0
if not levered into current FPDAM for 10646.
c. Preserves normalization stability.
d. Sets new precedent for correction of CJK
compatibility mapping errors.
___________________________________________