Re: [YANG] new pyang errors

Phil Shafer <phil@juniper.net> wrote:
> Andy Bierman writes:
> >Mandatory means it must be present in a
> >valid config, not that the manager must set some value.
> 
> That's certainly not the way I read mandatory.  Mandatory
> means that it must be set, meaning that some{one,thing}
> must set it.  If there were a reasonable default, you
> shouldn't need to make it mandatory.

This is one of the areas where we've had some discussions.  If you
classify leafs as 'mandatory' and 'optional', where does a leaf w/ a
default fit in?  IMO it doesn't really matter, it just have to be
clear.  In YANG we chose to define 'mandatory' as mandatory to set,
and a leaf with a default is optional to set.  Thus you cannot have
mandatory and default on one leaf.

/martin

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