Hangul jamo issues

[John C Klensin]

Kent,

These documents appear to be password-protected.  If you are
going to cite them, either make them public or distribute them
to this entire list.

thanks,
   john


--On Thursday, 04 January, 2007 22:22 +0100 Kent Karlsson
<kent.karlsson14 at comhem.se> wrote:

> 
> Soobok Lee wrote:
>>   NFKC maps these characters into Hangul Jamo Range 1100-11FF.
> 
> ["these" being Compatibility Hangul Letters]
> 
> Yes, but that mapping is not particularly useful, it is (when
> seen in its entirety)
> indeed wrong (though it may work by luck, not by design, for
> certain cases).
> 
> For a detailed exposition, see
> http://www.unicode.org/L2/L2006/06310-hangul-decompose9.pdf,
> and the associated data files
> http://www.unicode.org/L2/L2006/06310-AuxiliaryKSX1001Decompos
> itions-5.0 .0d3.txt
> and
> http://www.unicode.org/L2/L2006/06310-AuxiliaryHangulDecomposi
> tions-5.0. 0d3.txt.
> You will find multiple decompositions (suitable for different
> situations) for each of
> the Hangul Compatibility Letters.
> 
> (If you cannot access "unicore" documents, I can send you
> copies in personal emails.)
> 
>>   FFA0 === 3164 === U+1160 : compatibility equivalence for
>>   hangul
> filler
> 
> Yes, but... While U+FFA0 and U+3164 are basically the same,
> U+1160 is a completely 
> different thing, and has very different functionality from the
> first two. Full story in
> http://www.unicode.org/L2/L2006/06310-hangul-decompose9.pdf.
> 
>>   FFA1 === 3131 === U+1100 : compatibility equivalence for
>>   initial
> KI-EOK
>>   and so on.
> 
> Yes, but that is not the full story. Mostly U+3131 should be
> seen as "equivalent" to
> <U+1100, U+115F>, but sometimes it should also be mapped to
> U+11A8 in addition
> to U+1100. Full story in
> http://www.unicode.org/L2/L2006/06310-hangul-decompose9.pdf.
> 
>> U+3164, U+1160, U+FFA0 Hangul Filler:
>>  U+3164, U+1160 are displayed as blank space 
>>   in Windows.
> 
> Ideally, they should *not* be displayed as spaces. They are
> more akin to control characters, and indeed they are listed as
> "default-ignorable"
> 
> in Unicode.
> 
>>  U+FFA0  Half-width Hangul Filler is displayed
>>   as bold-faced middle dot in Windows.
>>  Need cautions in displaying these characters.
>> 
>> Both initial consonant U+1100 and 
>>  its final consonant correspondent U+11A8  
>>  are displayed in the exactly same glyph and margin in
>>  Windows.
> 
> Which is another bad idea. But Windows does not support Hangul
> Jamo properly.
> 
> 		/kent k
> 
> 
>>  And so forth for other consonants.
>>   Need cautions in registering and displaying these
>>   characters.
>> 
>> Soobok
>> 
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> 
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