# API reference

The top-level `nook` namespace re-exports everything most sessions need:
{func}`nook.level_scheme`, {func}`nook.decay_schemes` and
{func}`nook.ground_state`, plus the data model and the three backends.
The pages below are generated from the module docstrings.

```{eval-rst}
.. autosummary::
   :toctree: generated
   :recursive:

   nook
   nook.compare
   nook.plotting
   nook.sources.ensdf_file
   nook.sources.livechart
   nook.sources.ripl3
```