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

Peter Saint-Andre <stpeter@stpeter.im> Fri, 19 March 2010 04:14 UTC

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Date: Thu, 18 Mar 2010 22:14:02 -0600
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Subject: Re: [EAI] Localpart normalization (was Re: Downgrade Design Team Discussion Results Released)
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On 3/18/10 5:59 PM, John C Klensin wrote:
> 
> 
> --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.

Unfortunately, both Nodeprep (RFC 3920) and SASLprep (RFC 4013) used
NFKC, not NFC.

Peter

-- 
Peter Saint-Andre
https://stpeter.im/

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