Re: [idn] Suggested clarifications of the IDN requirements doc

[Patrik Fältström <paf@cisco.com>]

At 15.55 -0400 00-08-13, Keith Moore wrote:
>forward and reverse lookups aren't necessarily consistent even in
>ASCII DNS English names.  are we going to insist that they be consistent
>for IDNs?
>
>         at least two pilots do this. It is important to ensure that
>         both forward and reverse lookups can be made consistant.

Looking up the A and the PTR are two different operations which looks 
up two different RRs.

Whether the owner of the A and the RR data in the PTR are the same 
binary "thing", I don't care. It is up to the one creating the two 
records.

When a person is looking up an 'A' RR, and therefore have his query 
being "nameprepped" before matching the owner of the A, then looking 
up the PTR, and getting back the nameprepped version of his query. 
Will he be surprised or not? Or rather, will his software be 
surprised or not?

The most important thing is that the nameprep algorithm is well-known 
so we don't end up in the fuzzy world of "searches" instead of 
"lookup", servers returning more than one record that matches.

Think about how messy it would be during the registration process 
when two registered domainnames have to be different. I don't want to 
relax this rule saying that it is ok to have two domainnames being 
"the same". That breaks the whole idea with DNS.

Uniqueness is important.

   paf