[UA-discuss] IANA IDN Tables

Mark Svancarek marksv at microsoft.com
Mon Feb 26 19:10:00 UTC 2018

I misunderstood Andre's original post, sorry, my mind was thinking about the characters in the TLD, not the characters in the other labels.  Oops.

It still seems weird to me to have a superset table  (Japanese) as well as subset tables (Hiragana, Katakana) for the same TLD.  What's the utility?

-----Original Message-----
From: UA-discuss <ua-discuss-bounces at icann.org> On Behalf Of Andrew Sullivan
Sent: Monday, February 26, 2018 10:44 AM
To: ua-discuss at icann.org
Subject: Re: [UA-discuss] IANA IDN Tables

On Mon, Feb 26, 2018 at 05:30:38PM +0000, Mark Svancarek via UA-discuss wrote:
> コ andム  are katakana characters, so only examples 1 and 3 are valid from a
> language perspective.   Those characters do not exist within hiragana and I do
> not believe they exist as standalone Chinese characters, either.

That doesn't matter, because the characters _below_ the Katakana _could_ be Han or whatever.  Japanese is written in multiple scripts, so knowing that one label is only written with Katakana does not tell you whether another label might have Han characters in it.  It doesn't, indeed, even tell you that there might not be a Chinese name lower in the tree, much as com today permits characters outside the ASCII range.

Best regards,


Andrew Sullivan
ajs at anvilwalrusden.com

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