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Re: [netconf] Trouble with RFC 8040 (Restconf) fields Query Parameter

Martin Björklund <mbj+ietf@4668.se> Tue, 14 April 2020 20:22 UTC

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Date: Tue, 14 Apr 2020 22:22:36 +0200
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To: hrogge@gmail.com
Cc: netconf@ietf.org
From: Martin Björklund <mbj+ietf@4668.se>
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Subject: Re: [netconf] Trouble with RFC 8040 (Restconf) fields Query Parameter
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Hi,

Sorry for missing this.

Henning Rogge <hrogge@gmail.com> wrote:
> Anyone (Maybe the timing of the question just before the IETF was not
> that good ^^) ?
> 
> Henning Rogge?
> 
> On Thu, Apr 2, 2020 at 2:18 PM Henning Rogge <hrogge@gmail.com> wrote:
> >
> > Hi,
> >
> > I am trying to implement a Restconf (RFC8040) compliant server in
> > Python and having trouble interpreting the definition of the "fields"
> > query parameter (Section 4.8.3).
> >
> > Does the "fields-expr" ABNF allow multiple nested bracket parts?
> > e.g.:
> >
> > fields-expr = path ( path ; ( path ; path; ( path ; path ) ) )
> >
> > My guess is it allows to nest the "sub-selector" operator, but only
> > the rightmost of a series of multiple selected nodes ( split by ";" )
> > can be another sub-selector.
> >
> > Is this interpretation correct? What is the supposed semantic for this
> > kind of query parameter?

For example:

   "fields=album(genre;(admin/label;admin/catalogue-number))"

would select:

   album/genre
   album/admin/label
   album/admin/catalogue-number
   
as would:

   "fields=album(genre;(admin(label;catalogue-number)))"



/martin

> >
> > Henning Rogge
> 
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