Re: [Netconf] RFC6243 "with defaults" report-all and YANG "when" statements

["Sterne, Jason (Nokia - CA/Ottawa)" <[e-mail]>]

Also adding NETCONF.  This spans both groups.

From: Sterne, Jason (Nokia - CA/Ottawa)
Sent: Friday, August 24, 2018 9:27 AM
To: [e-mail]
Subject: RFC6243 "with defaults" report-all and YANG "when" statements

Hi all,

RFC6243 has a 'report-all' retrieval mode:

   When data is retrieved with a <with-defaults> parameter equal to
   'report-all', all data nodes MUST be reported, including any data
   nodes considered to be default data by the server.

I wanted to confirm how YANG "when" statements are supposed to interact with 'report-all'.

If a 'when' statement is (e.g. in some container abc) is currently not satisfied, then I believe a 'report-all' would not report the container abc or any of the descendant nodes of abc.  Is that correct ?

A "when" statement (when not satisfied) makes the associated nodes "invalid" so I assume that means they don't exist with their default values at all.

e.g.
leaf foo { type uint32; }
container abc {
   when "../foo = 1";
   leaf test1 { type uint32; default 50 }
}

If the <running> currently has this instance data:
    foo = 2
then I believe a 'report-all' retrieval would only return the following:
    <foo>2</foo>
and it would *not* return this data:
    <abc>
       <test1>50</test1>
    </abc>

Jason