Re: [YANG] keyref

Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> wrote:
> On Tue, Jan 22, 2008 at 09:44:30AM +0100, Martin Bjorklund wrote:
> 
> > That's why we don't want to allow keyrefs from config to non-config.
> > 
> > Maybe this is a use case that we want to support as well.  But I don't
> > see the difference between such a ref and a InterfaceIndex type
> > solution.
> 
> Well, the InterfaceIndex type just says "the value identifies an
> interface" - no more no less. The keyref is much more ambitiuous.
> Despite the fact that it is only usable for keys, your aim is to bind
> things together such that value changes automatically propagate.

No, no automatic propagation.

See
http://www.yang-central.org/twiki/bin/view/Main/YangExamplesExecdNtp
for a YANG example.  The idea in this example is that there is a list
of keys and a list of servers.  Each server uses exactly one key, and
this is done through a keyref.  When you try to set server/key, it
will only accept the name of an existing key.  If you try to remove
the key, the config will not validate.

/martin

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