Comments on IDNA Bidi

[JFCM]

At 15:54 17/01/2008, John C Klensin wrote:
>The short answer is that it is not realistic, in the general case, 
>to impose restrictions on one label based on the contents of another.

Except if you use classes triggered by an included code.
This would not be backward compatible with current DNS (what would 
protect from confusion), but in the case of an IDN class it could be 
OK  fo a bidi additional class.
jfc