High-level changes from IDNA2003 in the "current work"

Paul Hoffman phoffman at imc.org
Fri Mar 7 22:54:07 CET 2008

At 9:51 AM -0500 3/7/08, John C Klensin wrote:
>I would add two more...
>(h) Introduce the new concept of characters that can be used
>only in specific contexts.

Is this beyond what is covered in (c)?

>  > c) Remove the mapping and normalization steps from the
>  > protocol and have them instead done by the applications
>>  themselves, possibly in a local fashion, before invoking the
>>  protocol

That is, are there places other than in the application-supplied 
mapping where contexts of characters come up? If not, I'm fine with 
either adding the new (h). But, if the contexts are all in the 
application-supplied mapping, we could just rewrite (c) to cover that.

>(i) Explicitly separate the definitions for the "registration"
>and "lookup" activities and introduce explicit rules for
>validation of IDN strings before DNS lookup.

Good catch; yes.

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