-----Original Message----- From: Martin Bjorklund [mailto:[email protected]] Sent: 25 February 2016 15:17 To: William Ivory <[email protected]> Cc: [email protected] Subject: Re: [netmod] Clarification needed for YANG 1.1 XPATH context
William Ivory <[email protected]> wrote: > Hi, > > I'm looking for clarification on the meaning of the following > paragraph in section 6.4.1 (XPATH context) in RFC6020bis: > > 'If a node that exists in the accessible tree has a non-presence > container as a child, then the non-presence container also exists in > the tree.' > > It's unclear to me what this is trying to say, and why - for example, > does this mean that I need to validate any 'must' and 'when' > statements on the child container even when nothing within that child > container is configured? must expressions are always evaluated if the node where the must expression is defined exists, regardless of the number of children this node has. [wivory] So in my example where the child container (non-presence) has NO children, then it doesn't exist, and any must statement on it should not be run. Only when a non-presence container has a non-zero number of children should any 'must' statements on that container be run. [wivory] If that's the case, then would it be correct to say that the intention of this paragraph is as a reminder that one must evaluate 'must' statements on nodes that have no inherent meaning and exist only because they contain child nodes? Thanks, William /martin _______________________________________________ netmod mailing list [email protected] https://www.ietf.org/mailman/listinfo/netmod
