Re: [netmod] identityref with multiple base statements

Ladislav Lhotka <ladislav.lhotka@nic.cz> Mon, 03 August 2020 08:44 UTC

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From: Ladislav Lhotka <ladislav.lhotka@nic.cz>
To: Joey Boyd <joey.boyd@adtran.com>, "netmod\@ietf.org" <netmod@ietf.org>
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Date: Mon, 03 Aug 2020 10:44:38 +0200
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Subject: Re: [netmod] identityref with multiple base statements
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Joey Boyd <joey.boyd@adtran.com> writes:

> Hi,
>
> I am looking for some clarification regarding RFC 7950 section 9.10.2, specifically this statement.
>
> Valid values for an identityref are any identities derived from all the identityref's base identities.
>
> Example:
>
> identity base-1 {
>   description
>     "Base identity #1.";
> }
>
> identity base-2 {
>   description
>     "Base identity #2.";
> }
>
> identity a {
>   base base-1;
>   description
>     "Identity A.";
> }
>
> identity b {
>   base base-1;
>   base base-2;
>   description
>     "Identity B.";
> }
>
> identity c {
>   base base-2;
>   description
>     "Identity C.";
> }
>
> leaf reference {
>   type identityref {
>     base base-1;
>     base base-2;
>   }
>   description
>     "Reference to an identity.";
> }
>
> The question is how to determine the value space for this identityref.
>
> Option #1:
> The value space is any identity which is derived from both base identities. This means the only valid value in the example would be 'b'.
>
> Option #2:
> The value space is any identity which is derived from either base identity. This means the valid values are 'a', 'b' and 'c'.
>
> The phrasing "...derived from all the identityref's base identities." tends to point to Option #1 but I would like clarification on the intent.

Yes, #1 is correct.

Lada

>
> Best regards,
> Joey
>
> _______________________________________________
> netmod mailing list
> netmod@ietf.org
> https://www.ietf.org/mailman/listinfo/netmod

-- 
Ladislav Lhotka 
Head, CZ.NIC Labs
PGP Key ID: 0xB8F92B08A9F76C67