Re: [YANG] new pyang errors

Hi Balasz,

Balazs Lengyel píše v Pá 25. 01. 2008 v 12:19 +0100:
> Mandatory in YANG means mandatory to configure.
> Today YANG considers all mandatory and optional elements mandatory to implement.
> 
> Later we will probably define a conformance mechanism, then YANG will be able to say:
> 
> module foo defines 100 leafs and these 85 are mandatory to implement and the rest is optional.
> 
> We consider this conformance mechanism to belong to step to in the DML. AFAIK it is not really 
> used in SNMP either. (We could start using mustImplement or something similar as a term for 
> mandatory to implement.)

I guess it's actually one of the differences between the SNMP and XML
worlds. Validity of an XML document means conformance to a schema.

Lada

> 
> Balazs
> 
> Ladislav Lhotka wrote:
> > Phil Shafer píše v Pá 25. 01. 2008 v 01:14 -0500:
> >> "Randy Presuhn" writes:
> >>> In the SNMP/SMI worlds, the "optionality" Ladislav refers to is
> >>> handled by conformance statements, rather than the model per se.
> >> Ah so maybe the confusion is "mandatory to implement" versus
> >> "mandatory to configure".  YANG's mandatory statement is the latter.
> > 
> > Oh yes, this is the Pudels Kern :-) I am sorry I wasn't able to express
> > myself so concisely. However, I still think Sec. 7.6.4 in the YANG draft
> > can be understood as "mandatory to implement": >>If "mandatory" is
> > "true", the node must exist in a valid configuration if its parent node
> > exists.<< I guess it's again due to the different meanings of validity.
> > 
> > Lada
> > 
> >> YANG has no conformance mechanism.  Whether it appears in YANG-2.0,
> >> I can't predict, but I'm hoping we can make base models that devices
> >> can implement, with augmentations for additional config.
> >>
> >> Thanks,
> >>  Phil
> >>
> >>
> >> _______________________________________________
> >> YANG mailing list
> >> YANG@ietf.org
> >> https://www1.ietf.org/mailman/listinfo/yang
> 
-- 
Ladislav Lhotka, CESNET
PGP Key ID: E74E8C0C

_______________________________________________
YANG mailing list
YANG@ietf.org
https://www1.ietf.org/mailman/listinfo/yang