An Orphan Notebook

This means that is doesn’t appear in the Sphinx doctree (see index.rst), but other pages can still link to it (with :doc:`notebookname`).

Note: Orphan notebooks are not included in the PDF output!

Sphinx raises a warning in case of orphaned documents:

WARNING: document isn't included in any toctree

If you want to avoid this warning, you can add this to the notebook JSON metadata:

"nbsphinx": {
  "orphan": true
},