[Simple] Re: [Geopriv] Domain identifier in common policy

[Andrew Newton <andy at hxr.us>]

On Nov 11, 2005, at 1:25 PM, Henning Schulzrinne wrote:

> The last remaining open issue in common policy is the format of the  
> domain attribute in common policy.
>
> Concrete suggestion:
>
> Use RFC 3987 (internationalized domain names):
>
> ihost = IP-literal / IPv4address / ireg-name
>
> Every URI is also an IRI, so this should work generally. This  
> supports both IPv4 and IPv6. RFC 3987 also provides comparison  
> rules, in Section 5. This has the advantage that the same code  
> would already be needed for the full IRI comparison for the 'id'  
> parameter.

Given Jonathan's comment, I thought he was more focused on actual  
domain names and not IP addresses.  I don't care.  I just thought  
that was what was said.

Even if the domain field is limited to ireg-name, I do not believe  
that solves the problem.  I'm not an IRI expert, but it appears that  
not all ireg-name values are legal domain names.

And I still wonder about the IDN case, especially given that this  
appears to be an exact match.  Which form is the exact match  
performed on, the UTF8, a NamePrepped domain, or an ACE encoded  
domain.  Given that there can be variants of an IDN floating around  
on the wire, it always seems to me that the comparison should be done  
on the ACE version.

If there is somebody with better IDN-in-IRI clue, please correct me.

-andy



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