Title: LS reply to S5-254318 on the need for modeling isInvariant and 
SystemCreated in YANG
Submission Date: 2025-12-17
URL of the IETF Web page: https://datatracker.ietf.org/liaison/2088/

To: 3GPP TSG SA WG5
From: Network Modeling (netmod)
Purpose: In response


Email Addresses
---------------
From: Charles Eckel <[email protected]>
To: Susanna Kooistra <[email protected]>,Peter Schmitt 
<[email protected]>
Cc: Mahesh Jethanandani <[email protected]>,Charles Eckel 
<[email protected]>,Kent Watsen <[email protected]>,Network Modeling 
Discussion List <[email protected]>,Mohamed Boucadair 
<[email protected]>,Lou Berger <[email protected]>
Response Contacts: Kent Watsen <[email protected]>,Lou Berger 
<[email protected]>
Technical Contacts: 


Referenced liaison: LS reply to S5-254318 on the need for modeling isInvariant 
and SystemCreated in YANG (https://datatracker.ietf.org/liaison/2072/)

Body: 1. Description
 
The IETF NETMOD working group would like to thank you for your LS [1].
We are sorry the documents [2][3] shared in our previous LS [4] are not seen as 
suitable to be used in 3GPP SA5 specifications. While these documents have 
progressed reasonably far through the IETF publication process, there is still 
opportunity for change. The IETF is contribution driven. The NETMOD working 
group encourages engagement on the working group mailing list [5] and 
contributions to future working group meetings that propose any changes that 
might make the documents better suited for use in SA5 specifications.

2. Upcoming Meetings

IETF 125, 14 - 20 March 2026, Shenzhen, China
IETF 126, 18 - 24 July, Vienna, Austria

3. References

[1] https://datatracker.ietf.org/liaison/2072/
[2] https://datatracker.ietf.org/doc/draft-ietf-netmod-system-config
[3] https://datatracker.ietf.org/doc/draft-ietf-netmod-immutable-flag
[4] https://datatracker.ietf.org/liaison/2005/ 
[5] https://www.ietf.org/mailman/listinfo/netmod/
Attachments:

    LS reply to S5-254318 on the need for modeling isInvariant and 
SystemCreated in YANG
    
https://www.ietf.org/lib/dt/documents/LIAISON/liaison-2025-12-17-netmod-3gpp-tsg-sa-wg5-ls-reply-to-s5-254318-on-the-need-for-modeling-isinvariant-and-systemcreated-in-yang-attachment-1.pdf


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