IETF Logo Mail Archive

Re: ZWNJ and CONTEXT

"Erik van der Poel" <erikv@google.com> Mon, 07 April 2008 14:52 UTC

Return-Path: <erikv@google.com>
X-Original-To: idna-update@alvestrand.no
Delivered-To: idna-update@alvestrand.no
Received: from localhost (eikenes.alvestrand.no [127.0.0.1]) by eikenes.alvestrand.no (Postfix) with ESMTP id 5735825970D for <idna-update@alvestrand.no>; Mon, 7 Apr 2008 16:52:43 +0200 (CEST)
Received: from eikenes.alvestrand.no ([127.0.0.1]) by localhost (eikenes.alvestrand.no [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 12192-03 for <idna-update@alvestrand.no>; Mon, 7 Apr 2008 16:52:37 +0200 (CEST)
X-Greylist: domain auto-whitelisted by SQLgrey-1.6.7
Received: from smtp-out.google.com (smtp-out.google.com [216.239.33.17]) by eikenes.alvestrand.no (Postfix) with ESMTP id 85C8B25971D for <idna-update@alvestrand.no>; Mon, 7 Apr 2008 16:52:36 +0200 (CEST)
Received: from zps18.corp.google.com (zps18.corp.google.com [172.25.146.18]) by smtp-out.google.com with ESMTP id m37EqVsA026038 for <idna-update@alvestrand.no>; Mon, 7 Apr 2008 15:52:32 +0100
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=google.com; s=beta; t=1207579952; bh=qt1VWYXUDqUySGvs1UyrDAkLxGY=; h=DomainKey-Signature:Message-ID:Date:From:To:Subject:Cc: In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-Disposition:References; b=x476qmTqMHXIsSNjOcY1+mJXizaki5HN FwTixDxMhB7o4JXhUHG6DvxeYN9O3ad3m+MKgmX5Rn+3655DE7uBqA==
DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=received:message-id:date:from:to:subject:cc:in-reply-to: mime-version:content-type:content-transfer-encoding: content-disposition:references; b=UhlRqHdcmDwknRtlLbY6XMTxdzJeB+togmJirAPZ+nArd2WTVVueH3Mk+8Tsx74/c RE0Z5F5Elom0A/X2M958g==
Received: from wx-out-0506.google.com (wxdh27.prod.google.com [10.70.134.27]) by zps18.corp.google.com with ESMTP id m37EqURO032190 for <idna-update@alvestrand.no>; Mon, 7 Apr 2008 07:52:30 -0700
Received: by wx-out-0506.google.com with SMTP id h27so1344524wxd.15 for <idna-update@alvestrand.no>; Mon, 07 Apr 2008 07:52:29 -0700 (PDT)
Received: by 10.70.2.32 with SMTP id 32mr6221929wxb.42.1207579948882; Mon, 07 Apr 2008 07:52:28 -0700 (PDT)
Received: by 10.70.24.15 with HTTP; Mon, 7 Apr 2008 07:52:28 -0700 (PDT)
Message-ID: <c07a32650804070752x45783e86x4fef4e37e5bac792@mail.gmail.com>
Date: Mon, 07 Apr 2008 07:52:28 -0700
From: Erik van der Poel <erikv@google.com>
To: Alireza Saleh <saleh@nic.ir>
In-Reply-To: <47F9EE99.7080404@nic.ir>
MIME-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
References: <47F9EE99.7080404@nic.ir>
X-Virus-Scanned: by amavisd-new at alvestrand.no
Cc: idna-update@alvestrand.no
Subject: Re: ZWNJ and CONTEXT
X-BeenThere: idna-update@alvestrand.no
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: IDNA update work <idna-update.alvestrand.no>
List-Unsubscribe: <http://www.alvestrand.no/mailman/listinfo/idna-update>, <mailto:idna-update-request@alvestrand.no?subject=unsubscribe>
List-Archive: <http://www.alvestrand.no/pipermail/idna-update>
List-Post: <mailto:idna-update@alvestrand.no>
List-Help: <mailto:idna-update-request@alvestrand.no?subject=help>
List-Subscribe: <http://www.alvestrand.no/mailman/listinfo/idna-update>, <mailto:idna-update-request@alvestrand.no?subject=subscribe>
X-List-Received-Date: Mon, 07 Apr 2008 14:52:43 -0000

Hello Alireza,

The new IDNA documents are not RFCs yet -- they are Internet Drafts.

ZWNJ and ZWJ do not have real context rules yet. They are in Appendix A of:

http://www.ietf.org/internet-drafts/draft-klensin-idnabis-issues-07.txt

Unicode itself has some info about these characters at:

http://www.unicode.org/reports/tr31/tr31-8.html#Layout_and_Format_Control_Characters

Please feel free to make suggestions for IDNA itself on this list!

Erik

On Mon, Apr 7, 2008 at 2:51 AM, Alireza Saleh <saleh@nic.ir> wrote:
> Hi,
>
>  According to the new IDNA RFCs the ZWNJ and ZWJ are categorized as CONTEXTJ
> which they should have a contextual rule.  I haven't  find any rule in the
> RFC. Where should I find it ? Is it going to be proposed later ?
>  Is there any sample rule available that help us to suggest a suitable rule
> for usage of those characters in Arabic script.
>
>  Regards
>  Alireza
>  _______________________________________________
>  Idna-update mailing list
>  Idna-update@alvestrand.no
>  http://www.alvestrand.no/mailman/listinfo/idna-update
>

v2.23.0 | Report a Bug | By Email