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Re: Re: Standardizing on IDNA 2003 in the URL Standard

From: Jiankang Yao <yaojk@cnnic.cn>
Date: Thu, 16 Jan 2014 11:03:18 +0800
To: "Andrew Sullivan" <ajs@anvilwalrusden.com>
Cc: "Anne van Kesteren" <annevk@annevk.nl>, Mark Davis ☕ <mark@macchiato.com>, "PUBLIC-IRI@W3.ORG" <public-iri@w3.org>, "uri@w3.org" <uri@w3.org>, "John C Klensin" <klensin@jck.com>, "IDNA update work" <idna-update@alvestrand.no>, "Vint Cerf" <vint@google.com>, www-tag.w3.org <www-tag@w3.org>
Message-ID: <2014011611031545971122@cnnic.cn>

Aà.com has been registered.

Your search for Aà.com returns the below results:


Whois Server Version 2.0

   Domain Name: AÀ.COM (XN--A-SFA.COM)
   Registrar: INTERNET.BS CORP.
   Whois Server: whois.internet.bs
   Referral URL: http://www.internet.bs
   Status: clientTransferProhibited
   Updated Date: 12-sep-2013
   Creation Date: 22-feb-2009
   Expiration Date: 22-feb-2014

Jiankang Yao

From: Andrew Sullivan
Date: 2014-01-16 10:52
To: Jiankang Yao
CC: Anne van Kesteren; Mark Davis ?; PUBLIC-IRI@W3.ORG; uri@w3.org; John C Klensin; IDNA update work; Vint Cerf; www-tag.w3.org
Subject: Re: Re: Standardizing on IDNA 2003 in the URL Standard
On Thu, Jan 16, 2014 at 10:07:36AM +0800, Jiankang Yao wrote:
>   In which section of rfc idnabis does say some meaning related to  that " "Aà.com" is not PVALID"?

Upper case characters are not PVALID.  This is because of B:
toNFKC(toCaseFold(toNFKC(cp))) != cp.  In appendix B.1 it's
illustrated in this entry:


> I check Aà.com in verisign conversion tool, it shows "xn--a-sfa.com"
> http://mct.verisign-grs.com/convertServlet?input=A%C3%A0.com 
> does it follow idna2003 instead of idnabis?

I have no idea.  Maybe it has a bug.  Or maybe it does case mapping
before it touches the string; that's what RFC 5895 suggests.  In that
case, of course, the Verisign conversion tool includes some things
that applications are supposed to do.


Andrew Sullivan
Received on Thursday, 16 January 2014 03:03:48 UTC

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