Re: [netmod] [Anima] mcr's YANG question raised during the ANIMA WG session

[Michael Richardson <[e-mail]>]

I have taken a third pass at getting the extension of yang modules done.
This time, I am using RFC8791 (Structure), rather than YANG-DATA.
I do not use Augment (or structure-augment).  Not sure how I would.

My module D, which wants to inherit from A, B and C, even though B and C also
inherit from A, looks like this:

  sx:structure module-D-things {
    uses module-D;
  }

  grouping module-D {
    description "A module D structure";
    container module-D {
      description "A wrapper container for the module-D things";
      uses vA3:module-A-contents;
      uses vB3:module-B-contents;
      uses vC3:module-C-contents;
      uses module-D-contents;
    }
  }

  grouping module-D-contents {
    leaf attribute-D-Delta {
      type binary;
      description "DeltaThree";
    }
  }

This produces a tree printout of:

module: module-D3

  grouping module-D:
    +-- module-D
       +-- attribute-A-Alpha?   binary
       +-- attribute-B-Beta?    binary
       +-- attribute-C-Gamma?   binary
       +-- attribute-D-Delta?   binary
  grouping module-D-contents:
    +-- attribute-D-Delta?   binary

This is not great, but better than before.
The results are still at:

    https://github.com/mcr/yang-augment-test
    look at module-?3.yang and practice3.sh.

Please tell me/us (ANIMA WG) if we can do better.
We have revisions to RFC8366 that we'd like to go forward with, but we need
to make sure that we accomodate the extensions that are planned.
Probably converting to RFC8791 is also a good thing.

--
Michael Richardson <[e-mail]>   . o O ( IPv6 IøT consulting )
           Sandelman Software Works Inc, Ottawa and Worldwide