Katakana Middle Dot again (Was: tables-06b.txt: A.5, A.6, A.9)

[Patrik Fältström]

The rule I am thinking about is the following:

False;
For All Characters:
    If Script(cp) .in. {Hiragana, Katakana, Han} Then True;

Note that the Script of Katakana Middle Dot is neither of "Hiragana",  
"Katakana" or "Han".

    Patrik

On 28 jul 2009, at 00.43, Vint Cerf wrote:

> we ended up with a simple rule that says we need at least one Japanese
> character in the label not counting the middle dot to permit use of
> this middle dot character.
>
> vint
>
>
> On Jul 27, 2009, at 2:54 PM, Gervase Markham wrote:
>
>> On 25/07/09 15:11, Michel SUIGNARD wrote:
>>> At this point, I would prefer (somehow reluctantly) to have the Kana
>>> middle dot PVALID, instead of a complex contextual rule that some
>>> implementers are definitively going to get wrong.
>>
>> And I would prefer it to be DISALLOWED rather than PVALID, if we are
>> going to eliminate the rules.
>>
>> It's not just about appearance.
>>
>> "Yes Dad, as long as you are on double-you double-you double-you dot
>> paypal dot com, you are in the right place."
>>
>> "Hmm. I've got three double-yous, a dot, and then paypal then another
>> dot, and then com. That seems to be what he was saying. I must be  
>> OK."
>>
>> Dot and slash-like characters are uniquely problematic, and dot even
>> more than slash, because top-level domains have dots but no slashes.
>>
>> Gerv
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