Hi - >From: Ladislav Lhotka <lho...@nic.cz> >Sent: Aug 24, 2015 11:44 AM >To: Andy Bierman <a...@yumaworks.com> >Cc: "netmod@ietf.org" <netmod@ietf.org> >Subject: Re: [netmod] Y26 again, sorry ... >> YANG does not provide any mechanism to REQUIRE modules A and B >> to both be implemented on a server. You may think it should, but >> currently the YANG conformance is for an individual module. > >There are sections on conformance and conformance announcement, >and they say nothing like this. In my view, the data model comprises >*all* modules advertised by the server. I think your interpretation >of conformance might be an extrapolation from SNMP/SMI times, but, >for better or worse, it really has no support in the YANG spec.
It sounds as though you might be talking past each other. I believe part of Andy's point is that clients will need to deal with servers that do not implement (and thus do not advertise) the augmenting module. But there's (I think) a more interesting issue beneath this. Let's start with module M. Let's say M is for "modem" (to pick an obsolete but widely understood resource). Two different augmenting modules, F (for FSK - frequency shift keying) and Q (for QAM - quadrature amplitude modulation) are developed. Let us say that F and Q are mutually incompatible. A system with multiple Ms could well have both M+F and M+Q modems, but (if we claim F & Q are incompatible) could not have M+F+Q. If naked M is to be prohibited in systems (also) supporting F or Q or both, we don't currently have a mechanism to do so. Randy _______________________________________________ netmod mailing list netmod@ietf.org https://www.ietf.org/mailman/listinfo/netmod
