M-label definition

John C Klensin klensin at jck.com
Wed Apr 8 20:13:57 CEST 2009

--On Wednesday, April 08, 2009 18:08 +0200 Cary Karp
<ck at nic.museum> wrote:

> Quoting Mark:
>> In terms of exposition, however, I think the simplest choice
>> of terminology is that M-Label is anything that maps to a
>> U-Label, including the identity mapping.
> This means that "weiß" is not an M-label. Is that what we
> want?

Under IDNA2008, with the way the documents are today, it is an
M-label because the "ß" character is PVALID.

What causes you to think otherwise?


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