Hi Andy,
Thanks for your reply, my mean is not make the “Deviations be conditional”,
but want to add “when” statements to exist module definition, because vendor
may cannot support all specifications defined in IETF-YANG but need to add some
constrains.
Thanks & Regards
Walker (Guangying zheng)
From: Andy Bierman [mailto:[email protected]]
Sent: 2017年2月22日 3:24
To: Zhengguangying (Walker)
Cc: [email protected]; Qudan (Beijing-NOS); Guopeipei (Peipei Guo); Yangang
Subject: Re: [netmod] Hi all, one issue about YANG deviate's Substatements
On Tue, Feb 21, 2017 at 12:32 AM, Zhengguangying (Walker)
<[email protected]<mailto:[email protected]>> wrote:
Hi all,
When we define YANG models, there has one issue about “deviate's
Substatements”
In section 7.20.3.2. The "deviate" Statement given the Substatements
supported, but “when” not there.
config | 7.21.1 | 0..1 |
| default | 7.6.4, 7.7.4 | 0..n |
| mandatory | 7.6.5 | 0..1 |
| max-elements | 7.7.6 | 0..1 |
| min-elements | 7.7.5 | 0..1 |
| must | 7.5.3 | 0..n |
| type | 7.4 | 0..1 |
| unique | 7.8.3 | 0..n |
| units | 7.3.3 | 0..1 |
+--------------+--------------+-------------+
Now, we have the scenario to add “when” constrains when deviate the existed
YANG module, how I can do it?
You cannot add when-stmts to deviations.
It is not supported. Deviations cannot be conditional.
May be it need extend the Substatements of “devite” to add ”when”, what’s yours
opinion, please help to share, thanks.
Thanks & regards
Walker (Guangying zheng)
Andy
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