On Thu, May 21, 2015 at 10:38 AM, Per Hedeland <p...@tail-f.com> wrote:
> On 2015-05-21 19:14, Andy Bierman wrote:
>> On Thu, May 21, 2015 at 7:37 AM, Ladislav Lhotka <lho...@nic.cz> wrote:
>>>
>>> RFC 6020 also states that must and when expessions are XPath 1.0, and we 
>>> are moving away from it. This is IMO a much bigger change than Y45-04.
>>>
>>
>> Show me the "MUST NOT" that is getting reversed and I will agree with you.
>> I am not objecting to Y45-04.  I am objecting to removing a "MUST NOT"
>> from the standard.  Discussion of relative implementation complexity
>> of other YANG 1.1 changes is irrelevant.
>
> I don't have one for that, but these are:
>
>    A member type can be of any built-in or derived type, except it MUST
>    NOT be one of the built-in types "empty" or "leafref".
>
> I believe they're described as CLR in the issues doc...
>

I don't know about leafref, but type "empty" and a zero-length string
are identical on the wire, and that is allowed.  This is a trivial
change to YANG syntax. I don't think Y45 has such a trivial impact
on YANG syntax or usage.


> --Per Hedeland


Andy

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