Re: [netmod] Changing an identity base

[Jernej Tuljak <[e-mail]>]

On 27/01/2023 17:54, Italo Busi wrote:
> According to section 11 of RFC7950, the following change is considered BC:
>    o  A "base" statement may be added to an "identity" statement.
> Since, as explained in section 7.18.2 of RFC7950, the derivation of 
> identities is transitive, my understanding is that replacing a "base" 
> statement with new  "base" statement which is derived from the 
> previous one is also a BC change.
> Considering the example below, the NEW (A) change is BC according to 
> section 11 of RFC7950. However, NEW (B) is equivalent to NEW (A), 
> since the new baz is derived from foo, and therefore it is also a BC 
> change.
> Is my understanding correct?

I'd like a clarification regarding this as well.  Is "NEWB:bar" 
definition semantically equivalent to "OLD:bar" definition?

Jernej

> Thanks, Italo
> OLD
> identity foo {}
> identity bar {
>   base foo;
> }
> NEW (A)
> identity foo {}
> identity baz {
>   base foo
> }
> identity bar {
>   base foo;
>   base baz;
> }
> NEW (B)
> identity foo {}
> identity baz {
>   base foo
> }
> identity bar {
>   base baz;
> }
>
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