Re: [idn] opting out of SC/TC equivalence

[Eric Brunner-Williams in Portland Maine]

Over dinner (in a chinese restaurant in the China Town district of London,
of course), a vendor (here nameless) offered his opinon that ASCII users
will enjoy the use of "$" as an alternative to "s" (or "S"), when "$" (and
POSIX shell meta-characters are added to the ACE-or-native-via-utf-* IDN
character repetorire.

Thus:

        www.johnnyca$h.com
        www.micro$oft.com

(Note: www.johnnycash.com is a site, operated by the Estate of Johnny Cash,
 and www.microsoft.com is a site, operated by the MicroSoft Corporation)

I was unamused. Vendor promotion of locally scoped "surprises" is infra dig.

The same vendor, and some others not associated with any known vendor or dns
operator, also advocates TC/SC equivalence rules by registrants, which as L.
M. Tseng notes, would not amuse users on the Mainland, in Taiwan, or in Hong
Kong.

It is not useful to continue down this path.

2^^(number-of-chars-in-name) non-equivalencies does not scale, and that is
only for simple case of 1-to-1 character mappings.

The equivalences for Chinese characters are not privately defined, at least
not interoperably.

Eric