I have reviewed this document as part of the Operational Directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written with the intent of improving the operational aspects of IETF drafts. Comments that are not addressed during the last call may be included in AD reviews during the IESG review. Document editors and WG chairs should treat these comments like any other last call comments.

This document obsoletes [RFC9093] by replacing it in its entirety. It provides a new revision of the YANG module contained in that RFC, and retains the data types previously defined, but also adds new type（ietf-layer0-types ）definitions to the YANG module. The document is clear and well-written. The motivation is described well. The document is almost ready for publication. 

## Minor
1.For Normative References:
Please pay more attention to ​​draft-ietf-teas-rfc8776-update-17​​, which has not yet entered the IESG process.
2. The following text points to non-existent sections. [I-D.ietf-ccamp-optical-impairment-topology-yang] does not contain Section 2.5.2. Was "Section 2.6.2 of [I-D.ietf-ccamp-optical-impairment-topology-yang] perhaps intended as shown below
Current:
Section 2.5.2 of [I-D.ietf-ccamp-optical-impairment-topology-yang]
Perhaps:
Section 2.6.2 of [I-D.ietf-ccamp-optical-impairment-topology-yang]

## NITS:
- s/decending/descending/

Thanks for your contribution!
Best Regards,
Ran Chen