Yes – I definitely see this as a validate/commit time check (not a check during 
editing of a candidate).

From: maqiufang (A) <maqiufa...@huawei.com>
Sent: Wednesday, May 7, 2025 3:24 AM
To: Rob Wilton (rwilton) <rwil...@cisco.com>; Kent Watsen 
<kent+i...@watsen.net>; Jason Sterne (Nokia) <jason.ste...@nokia.com>
Cc: netmod@ietf.org
Subject: RE: [netmod] Re: 2nd WGLC on immutable-flag

Hi, Rob,

OLD: When a leaf node instance is immutable, it cannot be configured with a 
different value in read-write configuration datastores (e.g. <candidate>, 
<running>). It can be deleted in read-write configuration datastores (see 
section 7).
NEW: When a leaf node instance is immutable, it cannot be configured with a 
different value in read-write configuration datastores (e.g. <candidate>, 
<running>). Though it can be created/deleted in read-write configuration 
datastores. (see section 7).

I mostly agree with this, except, I think that you can configure an immutable 
node with a different value in candidate, it is just that the validate 
operation would fail, and attempts to commit the configuration should fail.  
Hence maybe leave candidate out of the example?
Yes, makes sense to me. It is possible for a rejection to update an immutable 
node in <candidate> to be delayed until a <commit> or <validate> operation 
takes place. Agree to leave <candidate> out of the example.
Kind regards,
Rob

Best Regards,
Qiufang


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