non-IDNA LDH Label ?
Shawn.Steele at microsoft.com
Mon Jul 19 18:20:10 CEST 2010
I'd expect some "fake" a-labels due to the disparity of allowed code points between 2003 and 2008. Presumably some labels will be fake by one or the other.
From: idna-update-bounces at alvestrand.no [idna-update-bounces at alvestrand.no] on behalf of Nicolas Williams [Nicolas.Williams at oracle.com]
Sent: Monday, July 19, 2010 9:16 AM
Cc: idna-update at alvestrand.no
Subject: Re: non-IDNA LDH Label ?
On Sun, Jul 18, 2010 at 05:42:12PM -0700, =JeffH wrote:
> Is it correct to define the notion of "non-IDNA LDH Labels" as the
> union of "NR-LDH labels" and "Fake A-labels" ?
I believe the answer is "no" because one should not register fake
A-labels. However, this is a "soft" no because there's no strong
requirement to not allow registration of fake A-labels.
In the long run I'd expect that there will be apps and/or libraries that
will produce warnings, and even errors when fed fake A-labels, even if
that's not today either required nor recommented, and even if it were
explicitly not allowed. Which means: we're all best off not allowing
the registration of fake A-labels in any DNS zones, and renaming any
where they exist.
> In other words, do "Fake A-labels" exist in the wild (whether or not
> their creation was purposeful or inadvertant) ?
It's possible. It's always been accepted that the IDNA prefix (xn--)
could collide with existing labels. It's just not very likely.
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