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Re: [Rats] Where does a EAT end? (was: Re: WGLC for https://datatracker.ietf.org/doc/html/draft-ietf-rats-eat)

Giridhar Mandyam <mandyam@qti.qualcomm.com> Thu, 02 June 2022 13:19 UTC

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From: Giridhar Mandyam <mandyam@qti.qualcomm.com>
To: Thomas Fossati <Thomas.Fossati@arm.com>, "rats@ietf.org" <rats@ietf.org>
Thread-Topic: [Rats] Where does a EAT end? (was: Re: WGLC for https://datatracker.ietf.org/doc/html/draft-ietf-rats-eat)
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Subject: Re: [Rats] Where does a EAT end? (was: Re: WGLC for https://datatracker.ietf.org/doc/html/draft-ietf-rats-eat)
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>> I think the underlying data structures make it extensible, independent of the CDDL notation.  However if an implementor chooses to extend EAT without an accompanying standard as a result, then interoperability may not be assured.  Therefore it is in an implementor's interest to define a standard if they are seeking interop.

>The core difference is the extensibility story for the claims-set is governed by the CWT Claims registry, whilst the EAT type system has no such mechanism (yet).

I don't agree:  the profile definition addresses interop - see https://datatracker.ietf.org/doc/html/draft-ietf-rats-eat#section-7.  Up to this point, no-one has objected to the way profiles are defined in the specification, nor the lack of a registry.

-Giri

From: Thomas Fossati <Thomas.Fossati@arm.com>
Sent: Thursday, June 2, 2022 6:13 AM
To: Giridhar Mandyam <mandyam@qti.qualcomm.com>; rats@ietf.org
Subject: Re: [Rats] Where does a EAT end? (was: Re: WGLC for https://datatracker.ietf.org/doc/html/draft-ietf-rats-eat)


WARNING: This email originated from outside of Qualcomm. Please be wary of any links or attachments, and do not enable macros.
> Giridhar Mandyam <mandyam@qti.qualcomm.com<mailto:mandyam@qti.qualcomm.com>> wrote:
> I think the underlying data structures make it extensible, independent
> of the CDDL notation.  However if an implementor chooses to extend EAT
> without an accompanying standard as a result, then interoperability
> may not be assured.  Therefore it is in an implementor's interest to
> define a standard if they are seeking interop.

The core difference is the extensibility story for the claims-set is
governed by the CWT Claims registry, whilst the EAT type system has no
such mechanism (yet).




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