Andy, in the past, there was the assumption that the operational value and the configured value are always the same. This is not really a 'change' but much more a clarification what the expression means in cases where the values differ.
/js On Fri, Jun 16, 2017 at 10:24:19AM -0700, Andy Bierman wrote: > The draft should make it clear that this change is being made. > Before there was no way to access the operational value. > Now there is only oerational value and no way to access the configured > value. > > > Andy > > > On Fri, Jun 16, 2017 at 10:18 AM, Phil Shafer <[email protected]> wrote: > > > Andy Bierman writes: > > >It has always been OK for a config=false data node's XPath expression to > > >point at a config=true data node. > > >But this has always meant the configured value. RD changes this behavior > > >because the new opstate datastore > > >contains only the operational values of config=true nodes. Now there is no > > >way for such an XPath expression > > >to test the configured value. > > > > The XPath will refer to the current operational value, which is > > better defined and more consistent behavior. During the lack when > > data is flowing between <intended> and <operational> as system > > components read and follow new incoming configuration data, the > > operational value should be guiding the constraints, not the > > unrealized incoming value. > > > > The XPath continues to work in a backwards compatible manner, but > > the outcome is more crisply defined and the <operational> datastore > > will have better odds of being self-consistent. > > > > Thanks, > > Phil > > > _______________________________________________ > netmod mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/netmod -- Juergen Schoenwaelder Jacobs University Bremen gGmbH Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany Fax: +49 421 200 3103 <http://www.jacobs-university.de/> _______________________________________________ netmod mailing list [email protected] https://www.ietf.org/mailman/listinfo/netmod
