Hi Mike,
On 16/10/2018 14:26, Michael Rehder wrote:
I've read rfc6110 and I didn't see any mention of "WHEN" on the mandatory
status (section 9.1.1 Optional and Mandatory Nodes doesn't list it which seems a bit odd
to me).
The section on "WHEN" just mentions the xpath mapping, not anything about
changing the mandatory status of the enclosing node.
I still think that the YANG RFC wording of "conditional" needs to indicate if
the node is mandatory status is affected or not.
Note that rfc6060 "3.1 Mandatory Nodes" doesn't mention "WHEN" (it does mention
presence).
By YANG RFC do you mean RFC 6020/7950?
Section 8.1 of RFC 7950 states the following constraints apply on valid
data trees:
o There MUST be no nodes tagged with "when" present if the "when"
condition evaluates to "false" in the data tree.
o The "mandatory" constraint is enforced for leafs and choices,
unless the node or any of its ancestors has a "when" condition or
"if-feature" expression that evaluates to "false".
o The "min-elements" and "max-elements" constraints are enforced for
lists and leaf-lists, unless the node or any of its ancestors has
a "when" condition or "if-feature" expression that evaluates to
"false".
These rules indicate that "when" trumps "mandatory", "min-elements" and
"max-elements".
Thanks,
Rob
Thanks
Mike
-----Original Message-----
From: Juergen Schoenwaelder [mailto:j.schoenwael...@jacobs-university.de]
Sent: Saturday, October 13, 2018 5:20 PM
To: Michael Rehder <michael.reh...@amdocs.com>
Cc: netmod@ietf.org
Subject: Re: [netmod] WHEN statement within mandatory objects doesn't
ensure presence of the mandatory object
On Fri, Oct 12, 2018 at 04:08:48PM +0000, Michael Rehder wrote:
The mandatory statement in that case is ignored (I’ve pointed out the
RNG and Schematron lack of enforcement). WHEN trumps the mandatory
status (via explicit mandatory or implicit mandatory via min-elements
1)
Has the RNG and Schematron been obtained following RFC 6110? If so, this may
be a problem with RFC 6110 but not with YANG itself. There are validators that
do not use RNG or Schematron.
/js
--
Juergen Schoenwaelder Jacobs University Bremen gGmbH
Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany
Fax: +49 421 200 3103 <https://www.jacobs-university.de/>
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