Tamil Numerals in IDNA

[Cary Karp]

Gihan Dias wrote:

> ... how would an individual registry decide whether to allow or
> disallow a character unless it were in an official document (e.g. an
> RFC)?

Registries make these decisions all the time. The permissible IDN repertoire is vastly larger than any given registry is likely to be able or willing to support. The limiting considerations are based on local factors and all the variation this implies cannot possibly be enshrined in an RFC.

/Cary