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Re: [EAI] Localpart normalization (was Re: Downgrade Design Team Discussion Results Released)

John C Klensin <klensin@jck.com> Thu, 18 March 2010 23:59 UTC

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Date: Thu, 18 Mar 2010 19:59:19 -0400
From: John C Klensin <klensin@jck.com>
To: Alexey Melnikov <alexey.melnikov@isode.com>, ima@ietf.org
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Subject: Re: [EAI] Localpart normalization (was Re: Downgrade Design Team Discussion Results Released)
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--On Thursday, March 18, 2010 23:38 +0000 Alexey Melnikov
<alexey.melnikov@isode.com> wrote:

> As a side note, one of the things suggested by the EAI
> downgrade design team should be further discussed and should
> be coordinated with the NewPrep BOF:
> 
> YAO Jiankang wrote:
>> The design team also noted that an informational RFC regarding
>> selection of addresses (both Unicode and ASCII) would be
>> helpful, that clients SHOULD use Unicode Normalization Form C,
>> and that servers MUST use NFC.
>>   
> Whatever normalization we recommend, it should be consistent
> with handling of nodes in XMPP (NodePrepBis) and SASLPrepBis.

Alexey, FWIW, RFC 5198 suggests NFC and explains why.  Unless
there is a really strong reason to do something else, my
recommendation is that all three of these specs conform to that
recommendation.

      john

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