Mixtures of scripts

[Paul Hoffman]

At 9:45 AM -0800 12/18/06, Mark Davis wrote:
>I don't think it is necessary. If mixtures of scripts are not 
>displayed (eg the user-agent flags them as discussed before), then 
>they are not a problem. If mixtures of scripts *are* allowed, then 
>there are so many other problems (eg with Cyrillic) that these pale 
>in comparison.

There is nothing in the current version of 
draft-klensin-idnabis-issues that prohibits "mixtures of scripts". 
The only place where anything like that is mentioned is a single 
sentence in 2.1.6:

    Registry restrictions might include prohibition of
    mixed-script labels, or restrictions on labels permitted in a zone if
    certain other labels are already present (See [RFC3743] and [RFC4290]
    for discussion of some of the methods that have been applied by some
    registries).

Please note that this says "might", and that it is about registries 
and not the protocol itself. Thus, assuming that "mixtures of 
scripts" are not allowed is incorrect.

If someone wants to this protocol to disallow mixtures of scripts, we 
need to see the specific way that will be done. Until then, we should 
assume that the current IDNA rules about mixing (namely: none) are in 
effect.