Re: [netmod] Comment on draft-clacla-netmod-yang-model-update-02

On Wed, 2017-11-15 at 05:27 -0500, Joe Clarke wrote:
> On 11/15/17 05:06, Ladislav Lhotka wrote:
> > > I suppose my gut reaction to Lou's question as to whether a server
> > > should support multiple versions was, "no."  A client may have multiple
> > > versions loaded to support servers that support different versions.  I
> > > may be convinced otherwise, but I feel that this will become untenable
> > > over time (even if module names change).
> > 
> > There are use cases for modules that are imported (i.e. not
> > implemented): it could be that a module author wants to use some
> > definitions from an old version of an imported module while, at the same
> > time, other definitions from a new version.
> > 
> > The semver-aware "import" statement should be able to deal with this.
> 
> I think it could be, but I also think importing from different versions
> of the same module feels messy.  How would this work with different
> module names today?  Just use different prefixes?  Are there defined use
> cases for this in the wild today?

Let's say a new version of a module adds new enums to two different enumeration
types, but an implementor (for some reason) is only able to update one of them
in the back-end and not the other.

Lada

> 
> Joe
> 
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-- 
Ladislav Lhotka
Head, CZ.NIC Labs
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