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Re: [core] CoAP Content format encoding for structures syntax and format parameters

Christian Groves <Christian.Groves@nteczone.com> Fri, 26 August 2016 06:12 UTC

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From: Christian Groves <Christian.Groves@nteczone.com>
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Date: Fri, 26 Aug 2016 16:12:09 +1000
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Subject: Re: [core] CoAP Content format encoding for structures syntax and format parameters
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Hello Michael,

The current senml draft requests 6 identifiers for the various 
senml+(encoding) options. Looking at 
https://www.iana.org/assignments/media-types/media-types.xhtml 
registering each structured syntax suffix seems to be the practise.

With regards to the parameters wouldn't the parameters first have to be 
defined by the content-format registration? As senml+json doesn't have 
parameters "version=2" would not be possible. If you wanted to define 
parameters I suppose new link attribute would be needed?

Regards, Christian


On 20/08/2016 8:12 AM, Michael Koster wrote:
> Hi,
>
> What is the curent thought wrt the CoAP content-format encoding for structured syntax media identifiers, like link-format+json, senml+cbor?
>
> Does each combination need to have its own IANA registered code, or is there a scheme for structured identifier codes in CoAP?
>
> Likewise, what is the preferred way to transmit media type parameters, for example with "application/senml+json; version=2" how do we transmit the version=2 part?
>
> Best regards,
>
> Michael
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