referencing IDNA2008 (and IDNA2003?)

[Vint Cerf]

andrew,

we were pretty explicit that the algorithm that produces A-labels
produces only lower case. check with John Klensin.

v


On Fri, Oct 22, 2010 at 10:20 AM, Andrew Sullivan <ajs at shinkuro.com> wrote:
> On Fri, Oct 22, 2010 at 03:30:45PM +0200, J-F C. Morfin wrote:
>
>> better we stay in our respective areas. And Internet IETF RFCs stay
>> within the boundaries of lowercase A-Labels.
>
> There is no guarantee that A-labels will never have capital letters in
> them, is there?  RFC 5891 says this in section 3.1, number 2:
> "A-labels MUST be compared as case-insensitive ASCII (as with all
> comparisons of ASCII DNS labels)."
>
> A-labels are, to an IDNA-ignorant application, just plain old DNS
> labels that happen to conform to the LDH hostname convention.  They
> can be in either case, AFAIK.
>
> A
>
> --
> Andrew Sullivan
> ajs at shinkuro.com
> Shinkuro, Inc.
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