Re: [netmod] schema mount and YANG library

[Lou Berger <[e-mail]>]

On 1/17/2018 11:26 AM, Ladislav Lhotka wrote:
>>>> But when we discussed this the last time having inline schema
>>>> available at the top level (in the SM module), the general consensus
>>>> was that having YL under inline was the preferred approach.
>>> What is new now is that we have an indirection; each instance has its
>>> own pointer to the schema at the top level.  In the previous
>>> discussion, having the schema at the top level implied that all
>>> instances shared the same schema, and*that*  was rejected.
>>>
>> Indirection was possible at the previous time and is part of the current
>> scheme Mount definition. Yes, you need to use different mount points to
>> reference different schema, but take a look at the ni document that's
>> exactly what we are doing there. So I don't believe this is the point that
> What Martin and I are talking about is a mount point that is a list node of the
> "use-schema" type. There is no way how different entries of this list could have
> different schemas.
>
> The same applies to a container mount point that is inside a list. Then you can
> also have multiple*instances*  of the mount point, and with "use-schema" there
> is no way how these instances could have different schemas.
umm, if a server knows enough to use the right metadata indirection (per 
current proposal), it would have also know enough to use the right mount 
point and use-schema (in the old proposal).  Again, the latter is what 
we're doing to solve this *exact* problem for the non-inline case in the 
NI draft.

The only thing new in the proposal is how to encode the indirection, it 
doesn't change the fundamental points/discussion from when we decided on 
the current solution.

Lou
> Lada
>