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Re: Unicode escape sequence | Re: draft-ietf-httpbis-header-structure-00, unicode range

Julian Reschke <julian.reschke@gmx.de> Wed, 14 December 2016 10:51 UTC

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To: Alexey Melnikov <alexey.melnikov@isode.com>, Poul-Henning Kamp <phk@phk.freebsd.dk>, Matthew Kerwin <matthew@kerwin.net.au>
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Cc: Kari Hurtta <hurtta-ietf@elmme-mailer.org>, Ilari Liusvaara <ilariliusvaara@welho.com>, HTTP working group mailing list <ietf-http-wg@w3.org>, Poul-Henning Kamp <phk@varnish-cache.org>
From: Julian Reschke <julian.reschke@gmx.de>
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Date: Wed, 14 Dec 2016 11:46:32 +0100
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Subject: Re: Unicode escape sequence | Re: draft-ietf-httpbis-header-structure-00, unicode range
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On 2016-12-14 11:38, Alexey Melnikov wrote:
> ...
>> Has this ever been used in a protocol?
> Some:
> https://datatracker.ietf.org/doc/rfc5137/referencedby/

Actually, one.

> This was also extensively used in other RFCs without referencing the BCP.

Example?

The reason why I'm asking is because the notation

  \u'HHHH' or \u'HHHHHH'

strikes me as:

1) verbose

2) potentially problematic because of the use of the single quote (which 
might require extra escaping in some contexts)

Best regards, Julian

PS: and, as a nit, it's strange that the syntax uses delimiters but 
doesn't allow sequences of 1 to 3 HEXDIGs...

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