Re: [Netconf] I-D Action: draft-ietf-netconf-rfc7895bis-05.txt

[Juergen Schoenwaelder <[e-mail]>]

On Mon, Mar 05, 2018 at 05:12:09PM +0100, Ladislav Lhotka wrote:
> On Mon, 2018-03-05 at 17:01 +0100, Juergen Schoenwaelder wrote:
> > On Mon, Mar 05, 2018 at 04:50:51PM +0100, Ladislav Lhotka wrote:
> > > > 
> > > > Note, that the deviation leaf-list is a leafref back to the module 
> > > > list.  Hence, for the YANG instance data to be valid, any entries in the 
> > > > deviation list must be included in the modules list.
> > > 
> > > Hmm, even this is actually not true - the type should have
> > > 
> > >   require-instance true;
> > > 
> > > right?
> > 
> > Yes, I think this should be there.
> >  
> > > If "module" and "deviation" are required to match, the document
> > > should say so.
> > 
> > Note that section 3 says:
> > 
> >    o  deviation list: The name of each YANG module with deviation
> >       statements affecting a given YANG module, in a given datastore
> >       schema, MUST be identified.
> > 
> > I know, this is in the objectives section and not in the YANG
> > definitions, perhaps we need to make this clear there as well.
> > Perhaps just change
> > 
> > OLD
> > 
> >      "List of YANG deviation modules used by this server to modify
> > 
> > NEW
> > 
> >      "List of all YANG deviation modules used by this server to modify
> 
> But still it doesn't say how the deviation list is determined from YLbis data. A
> server/client implementor may IMO choose any of the three options that I listed.
>

A server has to list _all_ deviation modules and I thought this takes
care of things. The reason for having this list is that a client
interested in say ietf-interfaces can directly find the modules that
contain deviations affecting ietf-interfaces. Hence a client has to
trust this list to be complete, i.e., the server has to report _all_
deviation modules. If you still feel something is missing, perhaps it
helps if you propose concrete text.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
Fax:   [phone]         <https://www.jacobs-university.de/>