Re: [netmod] Potential additions to rfc6087bis: RegEx guidelines

[Benoit Claise <[e-mail]>]

In this discussion, let's keep in mind that the openconfig modules use 
the POSIX regex while the IETF uses the W3C regex.
So for operators that have to deal with a mix of openconfig and IETF 
modules, this type of advice could be handy from a tooling point of 
view. Such advice, if not in RFC6087bis, could be provided in the yangre 
tool or in its GUI equivalent: https://yangcatalog.org/yangre

Regards, Benoit
> On Mon, Aug 28, 2017 at 12:58:59PM +0000, Xufeng Liu wrote:
>> [Xufeng] [0..9] is still compliant with the XSD pattern specified by
>> YANG 1.0 and 1.1. Using [0..9] instead of [\d] will make the
>> implementations with native POSIX RegEx easier without the need for
>> a tool to inspect every element of the RegEx pattern.
> Yes, but then \d is legal in YANG (and it is used in a couple of
> published RFCs).
>
> Educating _all_ module authors to write [0..9] instead of \d will
> likely be more expensive than improving the code of implementations
> that did not implement YANG entirely to accept \d.
>
> /js
>