ietf-dkim
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Re: [ietf-dkim] Internationalized domain names

2006-07-19 16:30:58
At 4:08 PM -0700 7/19/06, Douglas Otis wrote:
On Jul 19, 2006, at 10:29 AM, Paul Hoffman wrote:


Agreed.

Calling this an ACE label which is identified by the "xn--" prefix may avoid some of the confusion.

This could also be written as:

 Internationalized domain names MUST be converted using the
 steps in section 4 of [RFC3490] into "ACE" labels using the
 ToASCII function.

No, that's wrong: only the labels that have non-LDH characters are converted. Section 4 in IDNA covers this correctly.

Good point, but not exactly right either.

Please show *exactly* where the following is "not exactly right":
       Internationalized domain names MUST be converted using
       the  steps in section 4 of [RFC3490] using the ToASCII
       function.

A term for international domain names encoded into ACE labels would provide a useful reference, rather than calling this puny-code.

The proposed text does not use the term "puny-code".

The '_' underscore character is also not one of the 37 case-insensitive LDH (letter, digit, or hyphen) characters either, but the intent is not to include this label within this requirement.

Correct, and irrelevant.

While domain name encoding is specifically mentioned with the i= parameter where there are essentially no character restrictions for subdomains, this statement also applies to the d= tag as well.

Correct, and irrelevant. You cannot use "_" in labels in domain names in either i= or d=.

Perhaps:

 Internationalized domain names MUST be converted using the
 steps in section 4 of [RFC3490] into "ACE" labels when
 appropriate by applying the ToASCII function for "stored stings."
 This requirement does not apply to the "_domainkey" label.

No. Changing a simple, correct statement into a confusing one with new terminology is a bad practice. Please stop.
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