Re: [apps-discuss] Concise Binary Object Representation (CBOR)

[Dave Cridland <[e-mail]>]

On Thu, May 23, 2013 at 3:49 PM, Dave Crocker <[e-mail]> wrote:

> On 5/23/2013 7:21 AM, Dave Cridland wrote:
>
>> EXI makes certain assumptions about the data model in order to achieve
>> the most efficient encoding. EXI specifically can take into account not
>> only the generalized DOM, but also the schema of the XML encoded.
>>
>
> What does that mean in terms of specifics?  For example, what kind of
> assumptions?  The above is such a general statement, there's no way to know
> what it translates into, in terms of encoding style choices.
>
>
To switch example, JSON has no encoding for sets, or binary data, because
neither exist in the model it's encoding. Because they don't exist, there's
no need to encode them - if you wanted to encode them (because your source
model differs from that assumed), you'd need to do something else (like
base64 encoding). This naturally reduces efficiency.

CBOR clearly has a superset of this model - so it does have binary data,
but still does not have sets, for instance.

Dave.