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

2006-07-19 16:19:10

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

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.

-Doug


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