On Tue, Oct 13, 2015 at 03:09:34PM +0200, Ladislav Lhotka wrote: > > > On 13 Oct 2015, at 13:01, Juergen Schoenwaelder > > <j.schoenwael...@jacobs-university.de> wrote: > > > > On Wed, Oct 07, 2015 at 05:37:36PM +0000, Kent Watsen wrote: > >> > >> This is a notice to start a NETMOD WG last call for the document: > >> > >> Defining and Using Metadata with YANG > >> http://tools.ietf.org/html/draft-ietf-netmod-yang-metadata-02 > >> > >> Please indicate your support by Thursday October 22, 2015 at 9PM EDT. > >> We are not only interested in receiving defect reports, we are equally > >> interested in statements of the form: > >> > > > > I am concerned about this text: > > > > Annotations modify the schema of datastores and/or management > > protocol messages, and may also change their semantics. Therefore, > > due care has to be exercised when introducing annotations in > > network management systems in order to avoid interoperability > > problems and software failures. > > > > I think we should actually very clearly discourage annotations that > > modify the schema of datastores and/or management protocol messages > > instead of assuming all annotations are free to do so. > > Annotations modify the schemas by definition because otherwise XML > attributes, and objects in JSON encoding whose names start with "@", are not > allowed. >
For me, the schema of a datastore is the YANG data model. I do not want annotations that change the YANG data model of a datastore. Perhaps you mean something different but then the text allows multiple interpretations and hence it is problematic. Annotations should add metadata but I think metadata must not change the semantics of the data model itself. I am also concerned if metadata changes the semantics of protocol messages. I am not interested in standards-track mechanisms that at the end increase the chances of interoperability problems and software failures. /js -- 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 netmod@ietf.org https://www.ietf.org/mailman/listinfo/netmod
