[core] W3C EXI WG review of IETF CoRE WG Internet Drafts
Carine Bournez <carine@w3.org> Thu, 29 November 2012 10:00 UTC
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From: Carine Bournez <carine@w3.org>
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Subject: [core] W3C EXI WG review of IETF CoRE WG Internet Drafts
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Dear CoRE WG members, The W3C EXI Working Group has reviewed two CoRE I-Ds: http://trac.tools.ietf.org/id/draft-doi-core-parameter-option-01.txt http://trac.tools.ietf.org/id/draft-doi-exi-messaging-requirements-00.txt Here is a summary of our discussions. About section 2 of "CoAP Content-Type Parameter Option" http://trac.tools.ietf.org/id/draft-doi-core-parameter-option-01.txt We believe that the choice of a content-type parameter is a good one (as long as it does get implemented effectively by endpoints). However, the cleanest way would be still to use a content-encoding mechanism rather than a separate content-type indicating that EXI is used. So instead of: 'Accept: application/example-exi;sv=1.4' we suggest: 'Accept: application/example;sv=1.4' 'Accept-encoding: exi' About the second I-D, "EXI Messaging Requirements" http://trac.tools.ietf.org/id/draft-doi-exi-messaging-requirements-00.txt For the schema versioning concern mentioned in section 2.1, we interpeted the text (in the light of the core-parameter-option I-D ) as "schemaId will be sent as a content-type parameter". We want to highlight the fact that in practice the idea of using a 'Major.Minor' version number might not be needed. For minor changes to the schema, it may be interesting to use the deviation capabilities of the EXI processors, rather than offering a new schema for the content-type and deploy the change on a lot of endpoints. It would be easier to advise users to change the schema (to be negotiated) only when really necessary, i.e. format changes enable measurable performance improvements. For the Efficient XML Interchange Working Group, -- Carine Bournez -+- W3C
- [core] W3C EXI WG review of IETF CoRE WG Internet… Carine Bournez
- Re: [core] W3C EXI WG review of IETF CoRE WG Inte… DOI Yusuke
- Re: [core] W3C EXI WG review of IETF CoRE WG Inte… Yusuke DOI
- Re: [core] W3C EXI WG review of IETF CoRE WG Inte… Carsten Bormann
- Re: [core] W3C EXI WG review of IETF CoRE WG Inte… Carine Bournez