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

[Ladislav Lhotka <[e-mail]>]

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.

Lada

> 
> 
> /martin
> 
> 
> 
>> 
>> Lada 
>> 
>>> 
>>> container
>>> ---------
>>> 
>>> Encode the attributes within the container.
>>> 
>>> 
>>>  container baz;
>>> 
>>>  "baz": {
>>>     "@baz": {
>>>        "inactive": true,
>>>        "etag": "..."
>>>       }
>>>  }
>>> 
>>> 
>>> leaf-list
>>> ---------
>>> 
>>> Encode the attributes as a sibling to the leaf-list, with an array of
>>> same length as the leaf-list itself.
>>> 
>>> 
>>>  leaf-list buzz {
>>>     type string;
>>>  }
>>> 
>>>  "buzz": [ "val1", "val2", "val3" ],
>>>  "@buzz: [ null, 
>>>            { "inactive": true,
>>>              "etag": "..."
>>>            }
>>>            null]
>>> 
>>> 
>>> 
>>> /martin
>> 
>> -- 
>> Ladislav Lhotka, CZ.NIC Labs
>> PGP Key ID: E74E8C0C

--
Ladislav Lhotka, CZ.NIC Labs
PGP Key ID: E74E8C0C