IDN and language

John Cowan jcowan at
Tue Jan 4 23:37:44 CET 2005

John C Klensin scripsit:

> I suppose there are always exceptions.  In particular, the
> recommendations of RFC 3743 are about tables of characters, not
> dictionary lookup.   

I know that -- I did read 3743 first.  But in that case, whatever did
you mean by "ICANN has created a recommendation [...]  that languages
not be mixed within a label"?

> If, however, a domain decided to adopt a
> canonical dictionary and lookup in it as a registration
> criterion, that rule would be perfectly enforceable.  

Certainly.  But that is not the same as saying "languages [SHOULD]
not be mixed in a label."  That is a stricture about linguistic entities,
not about entries in a dictionary.

> Other issues occur if the writing order of
> characters in a language obeys specific rules and one chooses to
> enforce them (a potential issue with, e.g., Hangul, although,
> again, the choice of whether or not to try to enforce is up to
> the registry).  

This is even more confusing.  What languages do *not* impose a specific
writing order on their characters?

> It is not clear that the current proposal is much better than 3066
> for handling those cases, but I wonder if anyone has carefully
> evaluated whether it would make things worse.

How could it?  There is no requirement that there be a table for
every possible language tag, after all; all existing language tags
remain valid.  These tables are just tagged content like any other,
though the application of the tag is different from the usual

XQuery Blueberry DOM                            John Cowan
Entity parser dot-com                           jcowan at
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Infoset Unicode BOM                                 --Richard Tobin

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