Hi Robert,

>> 3) I wish more modules would following the pattern of having the global 
>> protocol accessible tree be defined via a "uses" of a grouping defined in 
>> the module.   In another recent project, I had to hack the topology modules 
>> defined in RFC 8345 (to convert the containers to groupings) to enable a 
>> multiplicity of "abstract network topologies" to be configured.   The 
>> assumption that only a single global instance is ever needed is proving to 
>> be invalid in my work time and again.
> 
> /me puts the co-author hat on.
> 
> The multiplicity is already built-in into the model by the fact that network 
> topologies is a top-level list.
> 
> Would you mind sharing the use case what requires multiplicity of the 
> built-in multiplicity?
> 
> I know this sort-of is a re-hash of the ietf-interfaces discussion, but while 
> there the use-case is well understood, I wonder what equivalent is there for 
> networks/topologies.


I appreciate that the model supports a multiplicity of topologies, and can see 
that it could support my needs, but my issue seems to arise in the intersection 
of the following desires:

        1) a server that supports multi-tenancy
        2) each tenant being able to define a number of topologies
        3) each tenant only being able to see their own topologies
        4) the server not supporting object-level access control
        5) the data-model being schema-mount like, whereby each tenant-instance 
contains *all* tenant nodes (e.g., all leafrefs are relative paths that never 
go above the tenant's subtree.

Kent

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