Re: New BMP characters (was Re: [very OT] Documentation: beyond

From: Thomas Chan (
Date: Wed Feb 21 2001 - 13:22:21 EST

On Wed, 21 Feb 2001, Jungshik Shin wrote:

> On Wed, 21 Feb 2001, Jungshik Shin wrote:
> > On Wed, 21 Feb 2001, Werner LEMBERG wrote:
> > > > South Korea's PKS 5700
> > > This is a North Korean standard AFAIK.
> >
> > No. AFAIK, PKS stands for 'Proposed Korean Standard' and as such PKS 5700
> > became KS C 5700 which in turn was renamed KS X 1005-1. Then, what is
> > KS X 1005-1? It's just the Korean version of ISO 10646 (aligned with
> > Unicode 2.0).
> I could be wrong in saying that PKS C 5700 became KS C 5700 although
> it's (almost) certain that PKS represents 'Proposed Korean Standard'
> (where Korean means South Korean). Unicode 3.0 (p. 259) lists two PKS
> C's as K source 2 and K source 3 (PKS C 5700-1 1994 and PKS C 5700-2
> 1994) and <>
> lists PKS C 5700-3 1998 as another K source. What is this mysterious
> PKS C 5700-[1-3]? I asked around in the past but haven't obtained the
> definitive answer. Perhaps, I should ask someone in IRG.

The unihan.txt file ver 3.0b1 (1999.7.2) lists four K- sources as:
  K0 KS C 5601-1987
  K1 KS C 5657-1991
  K2 PKS C 5700-1 1994
  K3 PKS C 5700-2 1994

It's very clear what K0 and K1 are, and they are given as GR ranges
arranged by pronunciation, and it is okay that these ranges overlap, since
K0 and K1 are two different character sets.

K2 has what appears to be GL ranges given for it (0x2121 .. 0x7530), and
arranged by radical+strokes. K3 looks similar, having what appear to be
GL ranges (0x2121 .. 0x3771), arranged by radical+strokes, but they all
fall within CJK Extension A. The ranges given for K2 and K3 also overlap.
(They seem reminiscent of the "planes" of CNS 11643 / EUC-TW .)

According to the 02n34428_cjk_b_fcd_mapping.txt file[1] (May 2000?), the
K source (#4?) is given as a decimal number from 0002 .. 0269, arranged by
radical+strokes, and all within CJK Extension B (but this file only deals
with Ext B, so that doesn't mean much). There seem to be some gaps in the
numbering, though. I'm not sure what to make of this in relation to K2
and K3, or the whole "PKS C 5700" thing. The later date (1998 vs. 1994)
must also be of some significance.

[1] Available at

Thomas Chan

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