Re: [core] YANG to CBOR mapping version 1

[peter van der Stok <[e-mail]>]

Hi Michel,

When a specification changes it set of of keys, I don't think the SIDs 
will change.
It is for sure that the hashes are not affected by the attribution of a 
key.

Therefore, what happens when client and server use different keys in 
otherwise identical list specification?

Peter

Michel Veillette schreef op 2016-07-12 17:07:
> Hi Peter
> 
> The validations performed by the entity which de-serialize the CBOR
> payload is based on the YANG schema.
> This validation is based on all king of YANG statements such as:
> key, unique, range, pattern, length, min-elements, max-elements, must,
> when, if-feature
> 
> The identification of which data nodes are keys is considered
> unnecessary meta-data since available in the schema.
> Even more heavy weight representations such as xml and json don't
> include this meta-data in the encode payload.
> 
> Regards,
> Michel
> 
> -----Original Message-----
> From: peter van der Stok [mailto:[e-mail]]
> Sent: Tuesday, July 12, 2016 6:08 AM
> To: Michel Veillette <[e-mail]>
> Cc: [e-mail]; Core <[e-mail]>
> Subject: RE: [core] YANG to CBOR mapping version 1
> 
> Hi Michel,
> 
>> 
>> However, I am missing how to transport a given list instance with its
>> key values in the CBOR encoding. Section 4.4 describes the encoding of
>> a complete list not a subset of its instances.
>> 
>> [MV] A list instance is a collection which is described in section 
>> 4.2.
>> ______________________________________________________________________
>> _______________________
> 
> With the current text I don't see how you distinguish instances with
> the same key from instances with different keys.
> 
> Example:
> 
> list server {
>       key name;
> 
>       leaf name {
>         type string;
>       }
>       leaf iburst {
>         type boolean;
>         default false;
>     }
> 
> How to distinguish that in the list below that two instances are
> identical (should not occur)
>     [
>       {
>         1755 : "NRC TIC server",          # name (SID 1755)
>         1754 : false,                     # iburst (SID 1754)
>       },
>       {
>         1755 : "NRC TIC server",          # name (SID 1755)
>         1754 : true,                     # iburst (SID 1754)
>       }
>     ]
> 
> And the following two instances are different  (valid array)
> 
>     [
>       {
>         1755 : "NRC TAC server",          # name (SID 1755)
>         1754 : true,                      # iburst (SID 1754)
>       },
>       {
>         1755 : "NRC TIC server",          # name (SID 1755)
>         1754 : true,                     # iburst (SID 1754)
>       }
>     ]