Re: [idn] case folding

[James Seng <jseng@pobox.org.sg>]

Wire format should not forbid these characters because DNS have RR which is
not just for hostname. Therefore, putting a hostname restriction on all RR
does not make sense.

This is what happened now in the DNS system. You can put anything (8bit) in
the DNS packet altho hostname is restricted to A-Z, 0-9 and '-'.

But I believe the second statement should modify to say "application which
uses hostname MUST constraint name strings to certain codepoint". This
constraint need not resident on gethostbyname() so it is probably bad idea to
limit this in requirement doc.

-James Seng

GIM Gyeongseog-KIM Kyongsok wrote:
> 
> On Mon, 12 Jun 2000, Harald Tveit Alvestrand wrote:
> >
> > - The DNS service layer (the packet formats that go on the wire)
> >    MUST NOT limit the codepoints that can be used.
> >    This interface SHOULD NOT assign meaning to name strings.
> > - The application service layer, where "gethostbyname" and friends reside,
> >    MAY constrain the name strings to be used in certain services.
> >
> > The difference is important.
> >
> >                   Harald
> 
> could you please elaborate this?
> 
> ±è °æ¼®, ºÎ»ê´ë Á¤º¸ ÄÄÇ»ÅÍ °øÇкÎ;
> KIM Kyongsok/GIM Gyeongseog, Busan National Univ.
> gimgs@hangeul.cs.pusan.ac.kr, http://hangeul.cs.pusan.ac.kr/hangeul/
> Ph: +82-(0)51-510-2292, Fax: +82-(0)51-515-2208