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Re: [netmod] WG Last Call for draft-ietf-netmod-syslog-model-15

Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> Tue, 18 July 2017 08:26 UTC

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Date: Tue, 18 Jul 2017 10:26:35 +0200
From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
To: Alex Campbell <Alex.Campbell@Aviatnet.com>
Cc: Kent Watsen <kwatsen@juniper.net>, "netmod@ietf.org" <netmod@ietf.org>
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Subject: Re: [netmod] WG Last Call for draft-ietf-netmod-syslog-model-15
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On Mon, Jul 17, 2017 at 11:20:40PM +0000, Alex Campbell wrote:
> I am considering to implement the data model in this draft. (dependent on business priorities of course)
> I have reviewed this draft and found the following issues.
> 
> * I see pattern-match is specified to use POSIX 1003.2 regular expressions. This is presumably for compatibility with existing implementations; however it is inconsistent with most of YANG (which is specified to use XPath regular expressions) - unless these are the same.

The fact that the schema language uses a different regular expression
language than the data model is by itself not a problem I think. What
is potentially a problem is that RFC 5424 syslog messages are UTF-8
and hence the regular expression language adopted should be able to
match on unicode characters. Does POSIX 1003.2 do that? (There also
needs to be a normative reference to POSIX 1003.2 or whatever is
finally adopted.)

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>

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