Re: [netmod] Y34

[Robert Varga <[e-mail]>]

On 07/21/2015 09:44 AM, Juergen Schoenwaelder wrote:
> Lada, you can't simply 'mount' a data model into a different place.
> Think about paths in must or when expressions, or think about paths
> contraints in leafrefs etc

In ODL we already have a language extension which does this. 
Semantically it embeds the conceptual 'root' node into container/list 
item. That item becomes the logical root against which all expressions 
in the embedded models are evaluated against, e.g. it is its own little 
world, no constraints coming in or out of it. While incoming references 
could be done (by just crossing the embedding item), we have not found a 
use case for it yet.

This works rather well for providing a 'pass-through' function through a 
network controller down to individual devices: the devices themselves 
are represented as nodes in the topology model (exposed on the 
northbound) and a container holding the 'mount-point'. All operations in 
the mount-point space are mapped to NETCONF operations on the device 
(and hence it is the device itself who enforces constraints and 
referential integrity).

Bye,
Robert