Re: [netmod] identityref with multiple base statements (follow-up question)

I have a follow-up question about this topic

Considering the same identities defined below, what would be the valid values the following references?

leaf reference-1 {
  type identityref {
    base base-1;
  }
  description
    "Reference to an identity #1.";
}

leaf reference-2 {
  type identityref {
    base base-2;
  }
  description
    "Reference to an identity #2.";
}

My understanding, is that:
- valid values for the reference-1 would be 'a' and 'b'
- valid values for the reference-2 would be 'b' and 'c'

Is my understanding correct?

Thanks, Italo

> -----Original Message-----
> From: Ladislav Lhotka [mailto:ladislav.lhotka@nic.cz]
> Sent: lunedì 3 agosto 2020 10:45
> To: Joey Boyd <joey.boyd@adtran.com>; netmod@ietf.org
> Subject: Re: [netmod] identityref with multiple base statements
> 
> 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
> 