Re: [idn] conflicts with ACE and STD13

["Eric A. Hall" <ehall@ehsco.com>]

Patrik Fältström wrote:

> I.e. I see this problem being orthogonal to the encoding of the
> Unicode codepoints, and have not much to do with the DNS protocol,
> which already can handle 0x00-0xFF.

The root problem case is that the STD13 legacy label type is used to
provide multiple encodings; this is an overloaded data-type problem more
than anything else [OT: it is the same root problem case that required
EDNS extended labels to be used for UTF-8].

The readily-visible problem case is that the canonical UCS character code
will have two values when encoded, and the appropriate encoding cannot
always be determined (see above).

-- 
Eric A. Hall                                        http://www.ehsco.com/
Internet Core Protocols          http://www.oreilly.com/catalog/coreprot/