Some YANG modules don't have a document

[bclaise]

Hi,

For example, I look at https://www.yangcatalog.org/yang-search/impact_analysis?rfcs=1&show_subm=1&show_dir=dependents&modtags=ietf-system-capabilities@2022-02-17.yang&orgtags=ietf
If I click on some YANG module, I see a Document field. For example, ietf-list-pagination.
Some other YANG modules don't have a Document field populated.
Ex:
https://www.yangcatalog.org/yang-search/module_details/ietf-yp-notification@2025-10-20
https://www.yangcatalog.org/yang-search/module_details/ietf-yp-observation@2025-10-20
Interestingly, those modules appears if I select "ratified"

Btw, I don't believe https://www.yangcatalog.org/yang-search/module_details/example-foo-extension@1970-01-01 should be present

Regards, Benoit