Re: [Rfc-markdown] bcp14, was: [xml2rfc-dev] New xml2rfc release: v2.25.0

Julian Reschke <julian.reschke@gmx.de> Mon, 26 August 2019 17:26 UTC

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To: Henrik Levkowetz <henrik@levkowetz.com>, xml2rfc-dev@ietf.org, xml2rfc@ietf.org, rfc-markdown@ietf.org
References: <E1i2EMD-0002SA-UW@durif.tools.ietf.org> <22880345-a324-8dfd-a08c-e8ec89aeb9b5@gmx.de> <20190826144520.GA19037@miek.nl> <40d507f2-ed78-e09f-ae96-c64333a91547@levkowetz.com>
From: Julian Reschke <julian.reschke@gmx.de>
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Date: Mon, 26 Aug 2019 19:26:36 +0200
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Subject: Re: [Rfc-markdown] bcp14, was: [xml2rfc-dev] New xml2rfc release: v2.25.0
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On 26.08.2019 19:14, Henrik Levkowetz wrote:
> . > It seems to me that the alternative to recognising "MUST&nbsp;NOT" as a
> valid keyword, and not emit warnings for it, is to disallow U+00A0 (which
> is equivalent to &nbsp; occurring in our XML) in this position.  To me,

Yes. Or warn about it.

> that seems worse than the original problem.
>
> It seems to me that future tools that process our XML should be prepared
> to deal with unicode whitespace generally, not only ASCII space.

Yes, but not necessarily everywhere.

<bcp14> was not added just for rendering, but also so that tools could
extract information about normative requirements.

I just don't see how detecting the keywords will work reliably if it
requires converting an essentially open-ended set of Unicode characters
(given that the set of whitespace characters can be extended).

If the sole reason for this change is to avoid breaking up MUST_NOT (and
friends), why not hard-wire that into the renderers (for HTML, I believe
it could be done with CSS...)? That will at least create consistency,
and avoid yet another task to deal with during AUTH48.

Best regards, Julian