Comments on the Unicode Codepoints and IDNA Internet-Draft

[Mark Davis]

I think you are mistreading Ken's statement, since he is aware that there is
no (formal) mapping phase. Where he says "The requirement
>in the protocol to normalize to NFKC will result in
>the correct Korean Hangul syllables in the range
>U+AC00..U+D7A3 being passed to the registry for lookup,"
read that as:

The requirement in the protocol that the text be in NFKC format results in
the correct Korean Hangul syllables ...

For example, a sequence of jamo "n" + "a" is disallowed by the protocol,
while the canonical equivalent syllable "na" is allowed.

Mark


On Mon, Jul 28, 2008 at 11:14 PM, Martin Duerst <duerst at it.aoyama.ac.jp>wrote:

> At 04:13 08/07/29, Kenneth Whistler wrote:
>
> >In addition, making the conjoining jamos DISALLOWED in
> >the table could lead to unexpected behavior for normalization
> >of Korean data in the context of an IDN protocol implementation.
> >
> >What Korea is attempting here is to restrict the allowed
> >repertoire of characters for registration to U+AC00..U+D7A3,
> >which is fine. But such characters might also be
> >represented on the wire or in other data sources in
> >terms of sequences of conjoining jamos. The requirement
> >in the protocol to normalize to NFKC will result in
> >the correct Korean Hangul syllables in the range
> >U+AC00..U+D7A3 being passed to the registry for lookup,
> >but restricting the conjoining jamos in the IDNA protocol
> >table itself is not a good idea.
>
> I agree with Mark and Ken in general, but I think the above two
> paragraphs are wrong. In IDNA 2008, the only thing we ever
> talk about is the normalized stuff. Ideally, things would be
> normalized at source. If not, there is (different to IDNA 2003)
> no guarantee that or how things will be normalized. Non-normalized
> character sequences are totally outside the protocol in IDNA 2008
> (at least as currently proposed).
>
> Regards,    Martin.
>
>
>
>
> #-#-#  Martin J. Du"rst, Assoc. Professor, Aoyama Gakuin University
> #-#-#  http://www.sw.it.aoyama.ac.jp       mailto:duerst at it.aoyama.ac.jp
>
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