Re: [Cbor] [Technical Errata Reported] RFC8610 (6527)

Sean Bartell <smbarte2@illinois.edu> Wed, 14 April 2021 14:54 UTC

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Date: Wed, 14 Apr 2021 09:53:02 -0500
From: "Sean Bartell" <smbarte2@illinois.edu>
To: "Doug Ewell" <doug@ewellic.org>, "Carsten Bormann" <cabo@tzi.org>
Cc: "christoph.vigano@uni-bremen.de" <christoph.vigano@uni-bremen.de>, "Henk Birkholz" <henk.birkholz@sit.fraunhofer.de>, "Francesca Palombini" <francesca.palombini=40ericsson.com@dmarc.ietf.org>, "cbor@ietf.org" <cbor@ietf.org>, "Murray S. Kucherawy" <superuser@gmail.com>, =?UTF-8?Q?Christian_Ams=C3=BCss?= <christian@amsuess.com>, "Barry Leiba" <barryleiba@computer.org>
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Subject: Re: [Cbor] [Technical Errata Reported] RFC8610 (6527)
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On Wed, Apr 14, 2021, at 09:29, Doug Ewell wrote:
> I just wrote:
> 
> > I'd like to see separate ABNF definitions for UNICODE_SCALAR_VALUE,
> > HIGH_SURROGATE, and LOW_SURROGATE, and then see 'hexchar' defined in
> > terms of those. I think that would make it clearer what is going on.
> 
> Of course it can't be UNICODE_SCALAR_VALUE, but something like 
> NONSURROGATE that conveys the meaning "any 4-digit hex value excluding 
> surrogates."

I'd be happy with handling surrogate pairs this way; it's much clearer than putting everything in one rule. Other than that, I don't have any particular opinion about Carsten's proposals.