-----Original Message-----
From: netmod [mailto:[email protected]] On Behalf Of Ladislav Lhotka
Sent: Friday, August 28, 2015 4:31 AM
To: Martin Bjorklund <[email protected]>; [email protected]
Cc: [email protected]
Subject: Re: [netmod] logical systems model


.....
<snip>

NACM, as well as all other modules we have, is based on the assumption of a 
single managed device.

I think it is a typical trend that what once was a single instance becomes an 
array. If we did ietf-routing 20 years ago, there would probably be no 
routing-instance list.

So I think it is a real problem that we can't migrate from a container to a 
list and reuse the container's data model. Groupings might help somewhat but 
they are still not fully reusable, if, for example, they contain absolute 
references.

Lada
</snip>

One comment, if you forgive the pitch, but this problem / use case is by the 
way exactly one of the reasons for mounting, which allows you to introduce and 
impose an additional structure on top of an existing structure, and "insert" 
the existing structure into it.  Augmentations etc can only add below the 
hierarchy, there is no way we can put a new container or list or whatever on 
top of an existing structure (without replicating the existing structure in a 
duplicate model), but peer-mount lets you do that.  One use case used in Open 
Daylight involves organizing/ inserting device-level information into a network 
inventory, which is basically imposed "on top".  

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