Re: [netmod] Y34 - root node

[Andy Bierman <[e-mail]>]

On Tue, Aug 25, 2015 at 10:25 AM, Kent Watsen <[e-mail]> wrote:

>
> I like the idea of relocatable modules.  It is almost to say everything
> defined by the IETF should be a grouping, allowing others to assemble the
> pieces as they see fit.  I do not think it makes sense for IETF to define
> an uber structure, especially using a language mandating forever backwards
> compatibility...
>
>
YANG groupings are not really relocatable.
If any object has a YANG constraint (must/when/path) that is outside the
grouping, then the grouping is not really relocatable.
Only groupings that have no "external references" can be relocated,
and this assumes the YANG is written using only relative roots, not
absolute paths.



Andy



How to support logical/virtual systems is a bigger discussion.   Certainly
> there is a huge data model overlap between the host system and the logical
> systems, but some data may only exist in the host system and some data may
> only exist in a logical system.  Making things more interesting, some data
> in the host system (e.g., an interface) can be exported to a logical system
> as a read-only value.   The way I solved this in another life was using
> conditional enablement [1] on a shared data model to indicate the
> applicability of nodes in a context.
>
> [1] https://tools.ietf.org/html/draft-kwatsen-conditional-enablement-00
>
> Kent, as a contributor
>
>
>
>