----- Original Message -----
From: "Eric A. Hall"
To: "John C Klensin"
Cc: "James Seng/Personal" ; "IDN"
Sent: Thursday, November 22, 2001 12:50 AM
Subject: Re: [idn] hostname history hell
>
> How about this as a believable compromise: We start with a "safe set" of
> alphanumeric characters and specifically exclude punctuation, spacing,
> symbols, and combining characters. Meanwhile, {some group} is going to
> investigate the use of additional characters in the DNS and the allowable
> set may be expanded at some point.
>
> The obvious problem with this approach is that it will be difficult to
> coordinate the two lists between the implementations.
If we want to prohibit assigned symbol characters
in the current version of nameprep consistently,
we should also necessarily prohibit all currently *unassigned code points* (UCP),
because current UCPs may become assigned to future symbol characters.
Then,this thread may fall again onto nameprep UCP handling and revision tagging
problems.
To avoid this, we should devise some new prohibiting mechanism other than
just blindly putting them in prohibition lists in a version of nameprep.
Soobok Lee
>
> --
> Eric A. Hall http://www.ehsco.com/
> Internet Core Protocols http://www.oreilly.com/catalog/coreprot/
>
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