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Re: [netmod] xpath for must statements

"Acee Lindem (acee)" <acee@cisco.com> Wed, 08 August 2018 11:28 UTC

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Martin Bjorklund <mbj@tail-f.com>
CC: "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [netmod] xpath for must statements
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Date: Wed, 08 Aug 2018 11:28:19 +0000
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Subject: Re: [netmod] xpath for must statements
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Thanks Martin - see inline. 

On 8/8/18, 3:43 AM, "Martin Bjorklund" <mbj@tail-f.com> wrote:

    Hi,
    
    "Acee Lindem \(acee\)" <acee=40cisco.com@dmarc.ietf.org> wrote:
    > Is it possible to indicate that choice statement must be specified
    > in a YANG 1.1 “must” clause w/o specifying every case?
    
    Do you mean that you to ensure that a case is always configured?  If
    so, mark the choice as "mandatory true".  It can't be done with an
    XPath expression.

It's not that easy since at the least the choice or another leaf must be specified. I found that the choice and case identifiers are not part of the Xpath. Even after rereading some sections of RFC7950, this wasn't intuitive.

Thanks,
Acee 
    
    
    /martin
    
    
    
    > Similarly, it is there a way specify that a container cannot be empty in “must” clause?
    > Thanks,
    > Acee

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