Re: [idn] IDN's with any ASCII character

["Adam M. Costello" <idn.amc+0@nicemice.net.RemoveThisWord>]

Doug Ewell <dewell@adelphia.net> wrote:

> U+00B5 MICRO SIGN would seem to be legal in an IDNA label

Yes, it is.  Although if you convert the label to ASCII and back again,
this code point will become U+03BC (Greek small letter mu) because of
the NFKC step in Nameprep.

Also note that just because a name is syntactically valid, that
doesn't mean a registry is under any obligation to let anyone register
it.  It is expected that most registries will be cautious and limit
registrations to subsets of Unicode that they are confident they
understand well enough to manage properly.

AMC