Re: [YANG] how to signal revision?

Ladislav Lhotka <lhotka@cesnet.cz> wrote:
> Hi Martin,
> 
> Martin Bjorklund píše v St 16. 01. 2008 v 12:35 +0100:
> > 
> > The idea is that we use the uri query argument to indicate the
> > revision number (see 7.1.3):
> > 
> >    <capability>http://acme.example.com/system?2007-06-09</capability>
> 
> This makes sense, but is the query argument allowed also in URNs?

Yes.  We also use them in rfc4741:

      urn:ietf:params:netconf:capability:url:1.0?scheme=http,ftp,file

> > But there are many common compatible changes you can do, the simplest
> > is to add new optional data.
> 
> This means that a client that uses a new revision could send data that
> the server doesn't know about. I don't think it's acceptable.

No, the client has to understand that it cannot send data that the
server doesn't support.  We want to achive two things essentially -
that the server accepts "an old backup" (copy-config), and that the
server can send all data is has, and let the client worry about
filtering out the stuff it doesn't understand.

/martin