Dear Authors/Chairs/ADs,

Following up on this; please see below for comments from the designated expert.

Please let us know how you'd like to address the comments regarding the removal 
of some instances of the "usage" parameter; this has been pending since 
February 11th.

Thank you.

Best regards,

David Dong
IANA Services Sr. Specialist

On Mon Mar 23 01:38:35 2026, david.dong wrote:
> Dear Authors/Chairs/ADs,
> 
> Following up on this; please see below for comments from the
> designated expert.
> 
> Please let us know how you'd like to address the comments regarding
> the removal of some instances of the "usage" parameter; this has been
> pending since February 11th.
> 
> Thank you!
> 
> Best regards,
> 
> David Dong
> IANA Services Sr. Specialist
> 
> On Wed Feb 11 10:42:22 2026, [email protected] wrote:
> > Hello David & COSE WG,
> >
> > I've reviewed the request. One thing that surprised me was the
> > presence
> > of an optional parameter "usage" without any explanation for some of
> > the
> > media types defined.
> > Is this a copy/paste error maybe? Has there been a media-types review
> > of
> > these already?
> >
> > Note that for all the CoAP Content-Format requests that do include a
> > "usage" parameter, the explanation is present! So this does not
> > hamper
> > the present registration request.
> >
> > If in Figure 20 the spaces in  "usage = chain" and "usage = c509"
> > could
> > be removed, per RFC 9876 Section 4.1.4, and the new media types are
> > approved, then this request can be approved.
> >
> > regards
> >
> > Esko
> 
> 
> On Wed Mar 11 23:30:20 2026, david.dong wrote:
> > Dear Authors/Chairs/ADs,
> >
> > Following up on this; please see below for comments from the
> > designated expert.
> >
> > Please let us know how you'd like to address comments; thank you.
> >
> > Best regards,
> >
> > David Dong
> > IANA Services Sr. Specialist
> >
> > On Tue Feb 24 18:00:52 2026, david.dong wrote:
> > > Dear Authors/Chairs/ADs,
> > >
> > > Following up on this; please see below for comments from the
> > > designated expert.
> > >
> > > Best regards,
> > >
> > > David Dong
> > > IANA Services Sr. Specialist
> > >
> > > On Thu Feb 12 21:23:16 2026, david.dong wrote:
> > > > Dear Authors/Chairs/ADs,
> > > >
> > > > Please see below for comments from the experts.
> > > >
> > > > Best regards,
> > > >
> > > > David Dong
> > > > IANA Services Sr. Specialist
> > > >
> > > > On Wed Feb 11 10:42:22 2026, [email protected] wrote:
> > > > > Hello David & COSE WG,
> > > > >
> > > > > I've reviewed the request. One thing that surprised me was the
> > > > > presence
> > > > > of an optional parameter "usage" without any explanation for
> > > > > some
> > > > > of
> > > > > the
> > > > > media types defined.
> > > > > Is this a copy/paste error maybe? Has there been a media-types
> > > > > review
> > > > > of
> > > > > these already?
> > > > >
> > > > > Note that for all the CoAP Content-Format requests that do
> > > > > include
> > > > > a
> > > > > "usage" parameter, the explanation is present! So this does not
> > > > > hamper
> > > > > the present registration request.
> > > > >
> > > > > If in Figure 20 the spaces in  "usage = chain" and "usage =
> > > > > c509"
> > > > > could
> > > > > be removed, per RFC 9876 Section 4.1.4, and the new media types
> > > > > are
> > > > > approved, then this request can be approved.
> > > > >
> > > > > regards
> > > > >
> > > > > Esko
> > > > >
> > > > >
> > > > > On 2/10/26 20:29, David Dong via RT wrote:
> > > > > > Dear Esko Dijk (cc: cose WG),
> > > > > >
> > > > > > As the designated expert for the CoAP Content-Formats
> > > > > > registry,
> > > > > > can
> > > > > > you review the proposed registrations in draft-ietf-cose-
> > > > > > cbor-
> > > > > > encoded-cert-16 for us?
> > > > > >
> > > > > > Please see:
> > > > > > https://datatracker.ietf.org/doc/draft-ietf-cose-cbor-
> > > > > > encoded-
> > > > > > cert/
> > > > > >
> > > > > > The due date is February 24th.
> > > > > >
> > > > > > If this is OK, when the IESG approves the document for
> > > > > > publication,
> > > > > > we'll make the registration at:
> > > > > >
> > > > > > https://www.iana.org/assignments/core-parameters/
> > > > > >
> > > > > > With thanks,
> > > > > >
> > > > > > David Dong
> > > > > > IANA Services Sr. Specialist

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