# Document Shepherd Write-Up for Group Documents
*This version is dated 4 July 2022.*
Thank you for your service as a document shepherd. Among the responsibilities is
answering the questions in this write-up to give helpful context to Last Call
and Internet Engineering Steering Group ([IESG]) reviewers, and your
diligence in completing it is appreciated. The full role of the shepherd is
further described in [RFC 4858]. You will need the cooperation of the authors
and editors to complete these checks.
Note that some numbered items contain multiple related questions; please be sure
to answer all of them.
## Document History
1. Does the working group (WG) consensus represent the strong concurrence of a
few individuals, with others being silent, or did it reach broad agreement?
This draft was last called in April 12 and the last call was extended one
more week and received a good reviews from Joe Clarke, Carsten Bormann,Tome
Petch. These reviews stand for strong concurrence of a few individuals, with
others being silent. This draft also acknowledged 4 people for valuable
2. Was there controversy about particular points, or were there decisions where
the consensus was particularly rough?
3. Has anyone threatened an appeal or otherwise indicated extreme discontent? If
so, please summarize the areas of conflict in separate email messages to the
responsible Area Director. (It should be in a separate email because this
questionnaire is publicly available.)
4. For protocol documents, are there existing implementations of the contents of
the document? Have a significant number of potential implementers indicated
plans to implement? Are any existing implementations reported somewhere,
either in the document itself (as [RFC 7942] recommends) or elsewhere
The document author has confirmed there is one implementation on the way,
The author's response can be found:
## Additional Reviews
5. Do the contents of this document closely interact with technologies in other
IETF working groups or external organizations, and would it therefore benefit
from their review? Have those reviews occurred? If yes, describe which
reviews took place.
This draft has closely interact with SBOM technologies developed by NTIA
Multistakeholder process on Software Component Transparency Framing Working
Group. It was agreed to remove SWID and add CycloneDX to improve
6. Describe how the document meets any required formal expert review criteria,
such as the MIB Doctor, YANG Doctor, media type, and URI type reviews.
A YANG Doctor review has been carried out by Ebben Aries which can
be found in the datatracker.
7. If the document contains a YANG module, has the final version of the module
been checked with any of the [recommended validation tools] for syntax and
formatting validation? If there are any resulting errors or warnings, what is
the justification for not fixing them at this time? Does the YANG module
comply with the Network Management Datastore Architecture (NMDA) as specified
in [RFC 8342]?
The PYANG compilation tool in the datatracker shows no errors and warnings
in YANG. Yes, the YANG module complies with the NMDA architecture.
8. Describe reviews and automated checks performed to validate sections of the
final version of the document written in a formal language, such as XML code,
BNF rules, MIB definitions, CBOR's CDDL, etc.
xml2rfc ietf tool and rfcfold, pyang,yanglint automation tools have been
installed to validate sections of the final version of the document
including example snippets. These tools show no errors and warnings in the
## Document Shepherd Checks
9. Based on the shepherd's review of the document, is it their opinion that this
document is needed, clearly written, complete, correctly designed, and ready
to be handed off to the responsible Area Director?
The document shepherd reviewed this document in more details during WGLC and
after WGLC and author of this document has addressed all the comments. Yes,
this document is clearly written, it can be see seen one useful companion
document triggered by supply chain transparency effort.
10. Several IETF Areas have assembled [lists of common issues that their
reviewers encounter]. For which areas have such issues been identified
and addressed? For which does this still need to happen in subsequent
This draft received YANG Doctor early review, OPSDIR review, GENART review,
SECDIR review, all comments from these have been well discussed on the
opsawg mailing list and addressed in the latest version.
11. What type of RFC publication is being requested on the IETF stream ([Best
Current Practice], [Proposed Standard, Internet Standard],
[Informational, Experimental or Historic])? Why is this the proper type
of RFC? Do all Datatracker state attributes correctly reflect this intent?
The type of RFC publication being requested on the IETF stream is proposed
standard. It is appropriate for a YANG model that extends IETF MUD model
work [RFC8520]. Yes, the datatracker state attributes correctly reflect
12. Have reasonable efforts been made to remind all authors of the intellectual
property rights (IPR) disclosure obligations described in [BCP 79]? To
the best of your knowledge, have all required disclosures been filed? If
not, explain why. If yes, summarize any relevant discussion, including links
to publicly-available messages when applicable.
WG chairs requested authors to confirm conformance with the
BCP 78 and BCP 79 on 2022-05-01, which can be found at:
The author of this document also confirmed again that there is no IPR
related to this document on 2022-06-10, which can be found at:
13. Has each author, editor, and contributor shown their willingness to be
listed as such? If the total number of authors and editors on the front page
is greater than five, please provide a justification.
There is two authors for this document. Both are willing to be listed as
14. Document any remaining I-D nits in this document. Simply running the [idnits
tool] is not enough; please review the ["Content Guidelines" on
authors.ietf.org]. (Also note that the current idnits tool generates
some incorrect warnings; a rewrite is underway.)
idnits tool flags no issues and warnings. Everything looks fine after reading
the content guidelines on author.ietf.org.
15. Should any informative references be normative or vice-versa? See the [IESG
Statement on Normative and Informative References].
16. List any normative references that are not freely available to anyone. Did
the community have sufficient access to review any such normative
All normative references are freely available to anyone.
17. Are there any normative downward references (see [RFC 3967] and [BCP
97]) that are not already listed in the [DOWNREF registry]? If so,
18. Are there normative references to documents that are not ready to be
submitted to the IESG for publication or are otherwise in an unclear state?
If so, what is the plan for their completion?
19. Will publication of this document change the status of any existing RFCs? If
so, does the Datatracker metadata correctly reflect this and are those RFCs
listed on the title page, in the abstract, and discussed in the
introduction? If not, explain why and point to the part of the document
where the relationship of this document to these other RFCs is discussed.
No change to any existing RFCs. The YANG model defined in this document just
imports module defined in RFC8520 which are normative references.
20. Describe the document shepherd's review of the IANA considerations section,
especially with regard to its consistency with the body of the document.
Confirm that all aspects of the document requiring IANA assignments are
associated with the appropriate reservations in IANA registries. Confirm
that any referenced IANA registries have been clearly identified. Confirm
that each newly created IANA registry specifies its initial contents,
allocations procedures, and a reasonable name (see [RFC 8126]).
The document shepherd has reviewed IANA considerations section and confirm
two new YANG registries, one MUD extension, one Well-Known Prefix
registries are correctly specified and consistent with the body of this
document.The referenced IANA registries have been clearly identified.
21. List any new IANA registries that require Designated Expert Review for
future allocations. Are the instructions to the Designated Expert clear?
Please include suggestions of designated experts, if appropriate.