Re: UTS46 "transitional period"

From: Mark Davis ☕ <>
Date: Tue, 28 Jun 2011 21:05:53 -0700

IDNA2008 doesn't require that validation be done on punycode.

   If the input to this procedure appears to be an A-label (i.e., it
   starts in "xn--", interpreted case-insensitively), the lookup
   application *MAY* attempt to convert it to a U-label

For IDNA2003, the processing is a bit murky. And some browsers check while
others don't.

UTS46, on the other hand, does require that a punycode label be validated,
so in this it is more strict than IDNA2008:

*— Il meglio è l’inimico del bene —*

On Tue, Jun 28, 2011 at 19:41, Chris Weber <> wrote:

> The registrar has this domain name registered
> and returns its own error page. I tried registering at
> several registrars and received the error that the domain name was invalid,
> not that it was taken, but that there was an error, or it was illegal
> punycode.
Received on Tue Jun 28 2011 - 23:07:32 CDT

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