Re: [netmod] I-D Action: draft-chopps-netmod-geo-location-00.txt

Martin Bjorklund <mbj@tail-f.com> Tue, 05 March 2019 14:05 UTC

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Date: Tue, 05 Mar 2019 15:05:01 +0100 (CET)
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To: chopps@chopps.org
Cc: wlupton@broadband-forum.org, netmod@ietf.org
From: Martin Bjorklund <mbj@tail-f.com>
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References: <sa67ede1jef.fsf@chopps.org> <CAEe_xxi4QeGbwQxXQFJE7EB9Cz1ee2ZhRLY9FOaNd3opw9M=Jw@mail.gmail.com> <sa65zsx4eay.fsf@chopps.org>
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Subject: Re: [netmod] I-D Action: draft-chopps-netmod-geo-location-00.txt
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Christian Hopps <chopps@chopps.org> wrote:
> 
> William Lupton <wlupton@broadband-forum.org> writes:
> 
> >> The intent was "ascii-printable". Would be nice if there was an easier
> > way to specify this. :)
> >
> > Printable ASCII characters are ' ' (space) through '~' (tilde) so
> > naively [
> > -~] should work ... but perhaps that makes unacceptable assumptions
> > -about
> > the locale and/or character encoding? (Certainly it should be OK if we
> > can
> > assume UTF-8, because all printable ASCII characters retain their
> > ASCII
> > representations in UTF-8.)
> 
> I think your suggestion is a good one!

Not sure I get it.  What exactly is the suggestion?

> YANG references
> <https://www.w3.org/TR/2004/REC-xmlschema-2-20041028/#dt-regex> says
> it will work too (its the range between the UTF code points, which in
> this case are the ascii values), but then that reference is also where
> i got the "#x22" hex format from that Martin said was invalid. :)

But they use the hex form in the grammar that describes XSD, and that
grammar uses EBNF as explained in
https://www.w3.org/TR/2000/WD-xml-2e-20000814.


/martin


> 
> Thanks,
> Chris.
> 
> >
> > On Mon, 4 Mar 2019 at 20:20, Christian Hopps <chopps@chopps.org>
> > wrote:
> >
> >>
> >> Martin Bjorklund <mbj@tail-f.com> writes:
> >>
> >> > Hi,
> >> >
> >> > Just some quick comments on the YANG:
> >> >
> >> > However, it seems libxml2's regexp engine requires both "[" and "^" to
> >> > be escaped:
> >> >
> >> >         '[-0-9a-z "#\[\]' +
> >> >         '!$%&()*+,./:;<=>?@\\\^_`{|}~]+';
> >> >
> >> > This expression isn't wrong, but it seems to me that these characters
> >> > should not have to be escaped.
> >> >
> >> > The pattern allows double quote (") but not single quote (').  Is
> >> > that intentional?
> >>
> >> The intent was "ascii-printable". Would be nice if there was an easier
> >> way
> >> to specify this. :)
> >>
> >> > [a simple way to test the patterns is to have a "default" statement
> >> > and a YANG complier that verifies defaults]
> >>
> >> Does pyang do this?
> >>
> >> > I recommend that you rename the example module in section to
> >> > "example-uses-geo-location" (and change the namespace to
> >> > urn:example:uses-geo-location).   We should not use the "ietf"
> >> > namespace for examples.
> >>
> >> Will do.
> >>
> >> Thanks,
> >> Chris.
> >>
> >> > /martin
> >> _______________________________________________
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> >> netmod@ietf.org
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> >>
>