On Fri, Aug 15, 2025 at 12:38 PM Reshad Rahman <reshad=
[email protected]> wrote:
> Hi,
>
> Using yanglint, when I try to validate the example in Appendix C of
> RFC8525, I get the following error:
>
> > data /home/xyz/YANG/example-yang-library.xml
>
> libyang[0]: Mandatory node "module-set-id" instance does not exist. (path:
> Data location "/ietf-yang-library:modules-state".)
>
> YANGLINT[E]: Failed to parse input data file
> "/home/xyz/YANG/example-yang-library.xml".
> >
>
> My understanding is that yanglint is behaving correctly (no presence-stmt
> in the modules-state container), but would like confirmation.
>
> If yes, is that worth an errata on RFC8525?
>
>
This may violate a guideline in RFC8407bis, but nothing in RFC 7950.
In practice, the server creates its own config=false data at boot-time, so
the constraint is not actually violated.
Mandatory=true for config=false is not validated on the server.
It means the node is expected in a response from the server requesting this
data.
It is validated by the client.
> Regards,
> Reshad.
>
>
Andy
> container modules-state {
>
> config false;
> status deprecated;
> description
> "Contains YANG module monitoring information.";
> leaf module-set-id {
> type string;
> mandatory true;
> status deprecated;
> description
> "Contains a server-specific identifier representing
> the current set of modules and submodules. The
> server MUST change the value of this leaf if the
> information represented by the 'module' list instances
> has changed.";
> }
> uses module-list {
> status deprecated;
> }
> }
>
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