IRGN841
From: John H. Jenkins [jenkins@apple.com]
Date: 2001-11-16 1:03
To: joe.zhang@unihan.com.cn
Subject: Fwd: Unicode<->CNS11643 mappings

We received the following question this morning.  Since the kIRG_TSource 
data in our Unihan database is derived from IRG data, it would appear that 
there are errors in the SuperCJK database.  Could this receive an IRG 
document number and be discussed at the Tokyo meeting?

Begin forwarded message:

> From: Kevin Bracey <kevin.bracey@pace.co.uk>
> Date: Thu Nov 15, 2001  07:50:29 AM US/Mountain
> To: unicode@unicode.org
> Subject: Unicode<->CNS11643 mappings
>
> I've been creating a new set of CNS11643-1992 <-> Unicode mapping 
> tables based on Unihan-3.1.1's kIRG_TSource tag, and have come across 
> a few glitches.
>
> Firstly, there is a typo in Unihan-3.1.1.txt. Compatibility ideograph
> U+2F958
> has its TSource listed as 6-4627, which clashes with U+28E84. U+2F958 
> is clearly not correct - its TSource should be 6-4267.
>
> Apart from that, it would appear that the CNS<->Unicode mapping 
> specified by Unihan is still not quite complete. It seems to me that a 
> complete round-trip mapping is the intent of Unicode 3.1, although I 
> haven't seen it explicitly stated.
>
> I have 19 characters in planes 3-7 that don't show up in the 
> kIRG_TSource
> mapping:
>
> Gap in plane 3 at 65/72 (6168)
> Gap in plane 4 at 02/59 (225B)
> Gap in plane 4 at 03/65 (2361)
> Gap in plane 4 at 07/74 (276A)
> Gap in plane 4 at 08/07 (2827)
> Gap in plane 4 at 08/93 (287D)
> Gap in plane 4 at 10/78 (2A6E)
> Gap in plane 4 at 16/34 (3042)
> Gap in plane 4 at 24/60 (385C)
> Gap in plane 4 at 35/46 (434E)
> Gap in plane 4 at 36/56 (4458)
> Gap in plane 4 at 67/25 (6339)
> Gap in plane 4 at 69/63 (655F)
> Gap in plane 5 at 03/43 (234B)
> Gap in plane 5 at 85/76 (756C)
> Gap in plane 6 at 10/01 (2A21)
> Gap in plane 6 at 60/15 (5C2F)
> Gap in plane 7 at 12/26 (2C3A)
> Gap in plane 7 at 33/57 (4159)
>
> The other 48,008 ideographs are round-tripped, with the assistance of 
> the CJK Compatibility Ideographs Supplement. Can anyone enlighten me 
> as to the status of the missing 19?
>
> I'm also not clear on the status of plane 15. Is it really part of CNS 
> 11642-1992?
>
> --
> Kevin Bracey, Principal Software Engineer
> Pace Micro Technology plc                     Tel: +44 (0) 1223 518566
> 645 Newmarket Road                            Fax: +44 (0) 1223 518526
> Cambridge, CB5 8PB, United Kingdom            WWW: http://www.pace.co.uk/
>
>

==========
John H. Jenkins
jenkins@apple.com
jenkins@mac.com
http://homepage.mac.com/jenkins/