Re: [I2rs-proto-dt] couple YANG details

Andy Bierman <andy@yumaworks.com> Wed, 21 October 2015 21:49 UTC

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Date: Wed, 21 Oct 2015 14:49:12 -0700
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From: Andy Bierman <andy@yumaworks.com>
To: Susan Hares <shares@ndzh.com>, i2rs-proto-dt@ietf.org
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Subject: Re: [I2rs-proto-dt] couple YANG details
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Hi,

We need to figure out for each YANG constraint:
 1) does it apply at all?
 2) is it MUST, SHOULD, or MAY enforce?
 3) Does the constraint apply the same in running vs. ephemeral?
 4) Does the constraint apply to the combined panes of glass or
     each pane independently?

Andy

On Wed, Oct 21, 2015 at 2:45 PM, Andy Bierman <andy@yumaworks.com>; wrote:

> Hi,
>
> I would like to simplify the draft a bit further.
>
> 1) module-level "ephemeral" flag
> Since the data node flag applies to the entire subtree,
> it should be simple enough to just require each top-level
> data node to declare 'ephemeral true' if needed.
> There are usually 1 - 2 top-level data nodes per module so
> this is not a burden.  Checking 2 places is too complicated
> and they can conflict.
>
> 2) groupings wrt/ edit overlap
>
> YANG already has a way to say what sub-nodes must
> be present (mandatory=true, min-elements>0).
> Is this good enough for I2RS?  Can the requirements
> for the ephemeral version be different than the
> persistent version, wrt/ mandatory & min-elements?
>
>
>