Use of the Prefer Header Field in Web Distributed Authoring and Versioning (WebDAV)
draft-murchison-webdav-prefer-14

[Ballot comment]
I don't think this doc updates RFC7240. It does not change any specification of RFC7240 and implementors of RFC7240 only need to consider this document in the context of WebDAV. Maybe it updates come WebDAV RFCs instead?

I'm also not certain that the HTTP Method Registry and HTTP Status Code Registry needs to be updated given that the definition of these things is not changed. However, at least for the Method Registry it might be useful to have a pointer to this doc in the registry.

(Via drafts-lastcall@iana.org): IESG/Authors/WG Chairs:

The IANA Services Operator has completed its review of draft-murchison-webdav-prefer-11.txt. If any part of this review is inaccurate, please let us know.

The IANA Services Operator understands that, upon approval of this document, there are three actions which we must complete.

First, in the HTTP Preferences subregistry of the Hypertext Transfer Protocol (HTTP) Parameters registry located at:

https://www.iana.org/assignments/http-parameters/

a single, new preference will be registered as follows:

Name: depth-noroot
Description: The "depth-noroot" preference indicates that the client wishes for the server to exclude the target (root) resource from processing by the WebDAV method and only apply the WebDAV method to the target resource's subordinate resources.
Reference: [ RFC-to-be ], Section 4
Notes: This preference is only intended to be used with WebDAV methods whose definitions explicitly provide support for the "Depth" [RFC4918] header field. Furthermore, this preference only applies when the "Depth" header field has a value of "1" or "infinity" (either implicitly or explicitly).

Because this registry requires Expert Review [RFC5226] for registration, we've contacted the IESG-designated expert in a separate ticket to request approval. Expert review should be completed before your document can be approved for publication as an RFC.

Second, in the Hypertext Transfer Protocol (HTTP) Method Registry located at:

https://www.iana.org/assignments/http-methods/

five existing registrations are to have their References changed as follows:

+------------+------------------------------------------------------------+
| Method | References |
| Name | |
+------------+------------------------------------------------------------+
| MKCALENDAR | RFC4791, Section 5.3.1; [ RFC-to-be ], Section 2.3 |
| MKCOL | RFC4918, Section 9.3; RFC 5689, Section 3; [ RFC-to-be ], |
| | Section 2.3 |
| PROPFIND | RFC4918, Section 9.1; [ RFC-to-be ], Section 2.1 |
| PROPPATCH | RFC4918, Section 9.2; [ RFC-to-be ], Section 2.2 |
| REPORT | RFC3253, Section 3.6; [ RFC-to-be ], Section 2.1 |
+------------+------------------------------------------------------------+

Third, in the Hypertext Transfer Protocol (HTTP) Status Code Registry located at:

https://www.iana.org/assignments/http-status-codes/

a single, existing registration will have its Reference changed as follows:

+-------+--------------------------------------------------+
| Value | References |
+-------+--------------------------------------------------+
| 412 | RFC7232, Section 4.2; [ RFC-to-be ], Section 3.2 |
+-------+--------------------------------------------------+

The IANA Services Operator understands that these three actions are the only ones required to be completed upon approval of this document.

Note:  The actions requested in this document will not be completed until the document has been approved for publication as an RFC. This message is only to confirm what actions will be performed.

Thank you,

Sabrina Tanamal
IANA Services Specialist
PTI

(1) What type of RFC is being requested (BCP, Proposed Standard, Internet Standard, Informational, Experimental, or Historic)? Why is this the proper type of RFC? Is this type of RFC indicated in the title page header?

Proposed Standard. This is the right category as it modifies behavior defined in other standards tracks documents, and already has multiple implementations.

The boilerplate indicates "Standards Track".


(2) The IESG approval announcement includes a Document Announcement Write-Up. Please provide such a Document Announcement Write-Up. Recent examples can be found in the "Action" announcements for approved documents. The approval announcement contains the following sections:

Technical Summary

This document defines an update to the HTTP Prefer header field to specify how it can be used by a WebDAV client to request that certain behaviors be employed by a server while constructing a response to a request. Furthermore, it defines the new "depth-noroot" preference.

Working Group Summary

This document was briefly discussed in the HTTPbis WG and AFAIK the CALEXT WG. For HTTPbis, it was felt to be too specific to WebDAV. For CALEXT, it's not really suited because it applies to many non-calendaring use cases (all authoring over HTTP/WebDAV, essentially).

Document Quality

Are there existing implementations of the protocol?

Yes, as described in the document.

Have a significant number of vendors indicated their plan to implement the specification?

See above.

Are there any reviewers that merit special mention as having done a thorough review, e.g., one that resulted in important changes or a conclusion that the document had no substantive issues?

I believe all reviewers that merit mention are mentioned.

If there was a MIB Doctor, Media Type or other expert review, what was its course (briefly)? In the case of a Media Type review, on what date was the request posted?

I personally reviewed the document from an HTTP, WebDAV and XML angle.

Personnel Who is the Document Shepherd? Who is the Responsible Area Director?

Julian Reschke. Alexey Melnikov.


(3) Briefly describe the review of this document that was performed by the Document Shepherd. If this version of the document is not ready for publication, please explain why the document is being forwarded to the IESG.

The document was reviewed multiple times in the course of the last months. It is felt to be ready for publication.

(4) Does the document Shepherd have any concerns about the depth or breadth of the reviews that have been performed?

No.

(5) Do portions of the document need review from a particular or from broader perspective, e.g., security, operational complexity, AAA, DNS, DHCP, XML, or internationalization? If so, describe the review that took place.

All domain-specific reviews have been done (see above).

(6) Describe any specific concerns or issues that the Document Shepherd has with this document that the Responsible Area Director and/or the IESG should be aware of? For example, perhaps he or she is uncomfortable with certain parts of the document, or has concerns whether there really is a need for it. In any event, if the interested community has discussed those issues and has indicated that it still wishes to advance the document, detail those concerns here.

No specific concerns.

(7) Has each author confirmed that any and all appropriate IPR disclosures required for full conformance with the provisions of BCP 78 and BCP 79 have already been filed. If not, explain why.

(mail sent)

(8) Has an IPR disclosure been filed that references this document? If so, summarize any discussion and conclusion regarding the IPR disclosures.

Not aware of any IPR disclosures.

(9) How solid is the consensus of the interested community behind this document? Does it represent the strong concurrence of a few individuals, with others being silent, or does the interested community as a whole understand and agree with it?

I believe the consensus is very strong.

(10) Has anyone threatened an appeal or otherwise indicated extreme discontent? If so, please summarise 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.)

Nope.

(11) Identify any ID nits the Document Shepherd has found in this document. (See http://www.ietf.org/tools/idnits/ and the Internet-Drafts Checklist). Boilerplate checks are not enough; this check needs to be thorough.

No nits.

(12) Describe how the document meets any required formal review criteria, such as the MIB Doctor, media type, and URI type reviews.

Checked all XML mechanically.

(13) Have all references within this document been identified as either normative or informative?

Yes.

(14) Are there normative references to documents that are not ready for advancement or are otherwise in an unclear state? If such normative references exist, what is the plan for their completion?

No.

(15) Are there downward normative references references (see RFC 3967)? If so, list these downward references to support the Area Director in the Last Call procedure.

No.

(16) Will publication of this document change the status of any existing RFCs? Are those RFCs listed on the title page header, listed in the abstract, and discussed in the introduction? If the RFCs are not listed in the Abstract and Introduction, explain why, and point to the part of the document where the relationship of this document to the other RFCs is discussed. If this information is not in the document, explain why the interested community considers it unnecessary.

It updated RFC 7240, and this is mentioned in the boilerplate.

(17) 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 protocol extensions that the document makes are associated with the appropriate reservations in IANA registries. Confirm that any referenced IANA registries have been clearly identified. Confirm that newly created IANA registries include a detailed specification of the initial contents for the registry, that allocations procedures for future registrations are defined, and a reasonable name for the new registry has been suggested (see RFC 5226).

This document updates entries for HTTP method definitions and status code definitions. It also registers a new preference for the "Prefer" header field. All of these have been checked.

(18) List any new IANA registries that require Expert Review for future allocations. Provide any public guidance that the IESG would find useful in selecting the IANA Experts for these new registries.

No new registries.

(19) Describe reviews and automated checks performed by to validate sections of the document written in a formal language, such as XML code, BNF rules, MIB definitions, etc.

The XML in the examples has been checked using rfc2629.xslt (see , "parse-xml-in-artwork").

The following Last Call announcement was sent out:

From: The IESG
To: "IETF-Announce"
CC: alexey.melnikov@isode.com, draft-murchison-webdav-prefer@ietf.org
Reply-To: ietf@ietf.org
Sender:
Subject: Last Call:  (Use of the Prefer Header Field in Web Distributed Authoring and Versioning (WebDAV)) to Proposed Standard


The IESG has received a request from an individual submitter to consider
the following document:
- 'Use of the Prefer Header Field in Web Distributed Authoring and
  Versioning (WebDAV)'
  as Proposed Standard

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the
ietf@ietf.org mailing lists by 2017-01-16. Exceptionally, comments may be
sent to iesg@ietf.org instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.

Abstract


  This specification defines how the HTTP Prefer header field can be
  used by a WebDAV client to request that certain behaviors be employed
  by a server while constructing a response to a request.

Editorial Note (To be removed by RFC Editor before publication)

  Please send comments to the Web Distributed Authoring and Versioning
  (WebDAV) mailing list at  [1], which may
  be joined by sending a message with subject "subscribe" to
    [2].  This mailing list is
  archived at  [3].

Open Issues

  o  Should we add any text regarding caching responses in Section 3?




The file can be obtained via
https://datatracker.ietf.org/doc/draft-murchison-webdav-prefer/

IESG discussion can be tracked via
https://datatracker.ietf.org/doc/draft-murchison-webdav-prefer/ballot/


No IPR declarations have been submitted directly on this I-D.