L2/02-457


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.
___________________________________________

RESPONSE:

Note with an "X" your choice of option A or option B.  E-mail your response
to Lisa Moore <lisam@us.ibm.com> and Cathy Wissink
<cwissink@microsoft.com>.  While the letter ballot time period is thirty
days, we ask that you respond as quickly as you can so that, if necessary,
we will be able to take a technical corrigendum to the WG2 meeting which
starts December 9, 2002. The title should be "Re: BALLOT on Five Canonical
Mapping Errors".

Once enough approvals (or disapprovals) have been received to carry the
vote, we will announce the result and close the ballot.
___________________________________________

If you have issues or problems with the precise wording or content of the
BALLOT ITSELF, they may be discussed among the corporate member
representatives by mailing to "corp-members@unicode.org". Any OTHER
discussion, such as TECHNICAL issues
is better held elsewhere, such as "unicore@unicode.org"