Contextual rule for MODIFIER LETTER PRIME?

[John C Klensin]

--On Thursday, July 16, 2009 03:43 -0700 Michel SUIGNARD
<Michel at suignard.com> wrote:

> I agree with the position expressed here. As long as 02B9 is
> allowed/requested in some context, it is just as easy to allow
> it in the protocol. Context conditions are just too
> complicated for that character and are bound to be
> controversial. I am too enthused though because of its
> resemblance to apostrophe (0027), but on the other end it will
> make supporters of many writing systems very happy.

I can live with this, but assume that it will lead directly to
labels that contain
    O<U+02B9>Reilly
in order to simulate
    O'Reilly

The perceived availability of such labels in the protocol will
almost certainly cause demands to permit that sort of
arrangement in SLDs and TLDs, not just down in the tree where
enterprises make up their own rules.  Since operating systems
won't parse it as an apostrophe or single quote, maybe there
will be no significant damage, but it makes me very anxious
indeed.

   john