Subject: [netmod] YANG Versioning Weekly Call Minutes - 2021-06-15

From: "Sterne, Jason (Nokia - CA/Ottawa)" <[email-masked]>
Date: Tue, 15 Jun 2021 20:08:03 +0000

YANG Versioning Weekly Call Minutes - 2021-06-15

We only discussed the module versioning draft today.

- remove the MUST NOT in the YANG module where it talks about substatements of the new extensions

Include the following text as part of section 7.1 author guidelines:

In some cases a module or submodule revision that is not strictly NBC by the definition in section 3.1.2 of this specification may include the "non-backwards-compatible"  statement. Here is an example when adding the statement may be desirable:
*             A "config false" leaf had its value space expanded (for example, a range was increased, or additional enums were added) and the author or server implementor feels there is a significant compatibility impact for clients and users of the module or submodule

We decided to avoid this example for now:
*             A complex or subtle change in a server implementation occurred and the compatibility impact to clients or users of the module or submodule aren't clear. it is better to err on the side of flagging this change as NBC to alert users of a possible impact.

But we may want to add these as examples (need some wordsmithing):
- leaf description change example
- if you aren't sure about a change, mark it NBC

NBC tag -> only for modules ?
revision-label -> can be used in modules and submodules

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