Re: [yang-doctors] 2 yang beginner questions

Andy Bierman <andy@yumaworks.com> Sat, 31 March 2018 03:14 UTC

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From: Andy Bierman <andy@yumaworks.com>
Date: Fri, 30 Mar 2018 20:14:02 -0700
Message-ID: <CABCOCHRHiFcgd8pJ2Xui4cv+=hVN5fdPp7axSjuGfwO-aEfBgQ@mail.gmail.com>
To: Toerless Eckert <tte@cs.fau.de>
Cc: YANG Doctors <yang-doctors@ietf.org>
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Subject: Re: [yang-doctors] 2 yang beginner questions
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On Fri, Mar 30, 2018 at 8:07 PM, Toerless Eckert <tte@cs.fau.de>; wrote:

> a) Is there some yang-users mailing list where i wouldn't have to bother
>    yang-doctors precious time with beginner questions, but rather seek
>    help from folks who may like me just be learning up yang themselves
>    (and be a bit ahead) ?
>
>    Typically the most easiest way to learn something is to be subscribed
>    to a list where other beginners ask questions and get them answered too
> ;-)
>
> b) https://tools.ietf.org/html/draft-ietf-anima-voucher-07
>
>    I am confused about the best way to express an OR condition.
>
>    container voucher {
>       leaf expires-on {
>          must "not(../nonce)"
>       }
>       leaf nonce {
>          must "not(../expires-on)"
>       }
>    }
>
>    What we do WANT to achieve is that you may have at least one of
>    the leaf expires-on or nonce. Having both is fine too (inclusive or).
>    Just not having either is not permitted.
>
>    Is this the correct syntax to do that ? Is that the preferred syntax to
> do this ?
>
>
  container voucher {
      must "expires-on or nonce";
      leaf expires-on {
      ...
      }
      leaf nonce {
       ....
      }
   }



> Thanks
>     Toerless
>
>
Andy


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