Re: [netmod] attributes in draft-lhotka-netmod-yang-json

[Martin Bjorklund <[e-mail]>]

Andy Bierman <[e-mail]> wrote:
> On Wed, Mar 26, 2014 at 7:10 AM, Ladislav Lhotka <[e-mail]> wrote:
> 
> >
> > On 26 Mar 2014, at 14:57, Martin Bjorklund <[e-mail]> wrote:
> >
> > > Ladislav Lhotka <[e-mail]> wrote:
> > >> Martin Bjorklund <[e-mail]> writes:
> > >>
> > >>> Hi,
> > >>>
> > >>> Here's yet another attempt to handle attributes in JSON, without
> > >>> changing the encoding for the case that there are no attributes
> > >>> present.
> > >>>
> > >>> In all examples, the attributes "inactive" and "etag" are present.
> > >>>
> > >>> Attributes are encoded differently depending on the type of object:
> > >>>
> > >>>
> > >>> leaf
> > >>> ----
> > >>>
> > >>> Encode the attributes as a sibling to the leaf.
> > >>>
> > >>>
> > >>>  leaf foo {
> > >>>    type string;
> > >>>  }
> > >>>
> > >>>  "foo": "some value";
> > >>>  "@foo": {
> > >>>     "inactive": true,
> > >>>     "etag": "...";
> > >>>   }
> > >>>
> > >>>
> > >>> list instance
> > >>> -------------
> > >>>
> > >>> Encode the attributes within the list instance.
> > >>>
> > >>>
> > >>>  list bar {
> > >>>    key name;
> > >>>    leaf name {
> > >>>      type string;
> > >>>    }
> > >>>    ...
> > >>>  }
> > >>>
> > >>>  "bar": [
> > >>>     {
> > >>>        "@bar": {
> > >>>           "inactive": true,
> > >>>           "etag": "..."
> > >>>         }
> > >>>         "name": "instance name";
> > >>>      }]
> > >>>
> > >>
> > >> This could be ambiguous:
> > >>
> > >> list bar {
> > >>  key name;
> > >>  leaf name { ... }
> > >>  leaf bar { ... }
> > >> }
> > >>
> > >> Then you don't know whether the attributes belong to the list entry
> > >> or to the contained leaf.
> > >
> > > Right. Then we use "@@bar" for the list / container attributes.
> >
> > OK, then this scheme is fine with me.
> >
> >
> Looks more complicated than other solution proposals.

Do we agree that we don't want different encodings for values if there
are attributes or not?  I.e., if my code works when no attributes are
present, it should also work if there are attributes?

If so, do we have any other proposal?

I am all for a simpler solution!


/martin