# IETF 126 - Agenda for Constrained RESTful Environments (CoRE) WG

Chairs (core-chairs@ietf.org):

* Marco Tiloca (marco dot tiloca at ri dot se)
* Jaime Jiménez (jaime at iki dot fi)
* Carsten Bormann (cabo at tzi dot org)

Date and time: Thursday, 2026-07-23, 12:00-14:00 UTC

https://www.timeanddate.com/worldclock/fixedtime.html?msg=CoRE+%40+IETF+126&iso=20260723T12&p1=1440&ah=2

Meeting material: https://datatracker.ietf.org/meeting/126/session/core

Notes: https://notes.ietf.org/notes-ietf-126-core

Meetecho video stream: https://meetings.conf.meetecho.com/ietf126/?session=35524

Meetecho for onsite participants: https://meetings.conf.meetecho.com/onsite126/?session=35524

Audio stream: https://mp3.conf.meetecho.com/ietf126/35524.m3u

Zulip: https://zulip.ietf.org/#narrow/stream/core

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Numbers in parentheses are minutes of time allocated.

## Intro, agenda, status (Chairs) (10)

* WG and document status since IETF 125

## URI Path Abbreviation in CoAP (Christian Amsüss) (10)

* https://datatracker.ietf.org/doc/draft-ietf-core-uri-path-abbrev/

## Conditional Query Parameters (Bilhanan Silverajan) (10)

* https://datatracker.ietf.org/doc/draft-ietf-core-conditional-attributes/

## Key Update for OSCORE (Rikard Höglund) (10)

* https://datatracker.ietf.org/doc/draft-ietf-core-oscore-key-update/

## Observe Multicast Notifications (Marco Tiloca) (10)

* https://datatracker.ietf.org/doc/draft-ietf-core-observe-multicast-notifications/

## Non-traditional Response Forms (Carsten Bormann) (10)

* https://datatracker.ietf.org/doc/draft-ietf-core-responses/

## CORECONF: COMI, YANG Library, YANG Metadata (Carsten Bormann) (15)

* https://datatracker.ietf.org/doc/draft-ietf-core-comi/

* https://datatracker.ietf.org/doc/draft-ietf-core-yang-library/

* https://datatracker.ietf.org/doc/draft-ietf-core-yang-metadata/

## OSCORE-capable Proxies (Rikard Höglund) (10)

* https://datatracker.ietf.org/doc/draft-ietf-core-oscore-capable-proxies/

## KEM for Group OSCORE (Marco Tiloca) (10)

* https://datatracker.ietf.org/doc/draft-tiloca-core-group-oscore-kem/

## YANG SID Discovery using DNS (Laurent Toutain) (10)

* https://datatracker.ietf.org/doc/draft-toutain-core-sid-encoding/

## CoAP Extensions for Task Resources (Linzhe Li) (10)

* https://datatracker.ietf.org/doc/draft-li-coap-task-resources/

## CoAP Message Diagnostic Notation (Jaime Jiménez / Carsten Bormann) (5)

* https://datatracker.ietf.org/doc/draft-jimenez-core-coap-diag/

Σ 120