# `model`: The Typed Document Model (nodes, token bridge, and traversal)

```{py:currentmodule} myform.model
```

The absolute middle of the `myform` pipeline: `nodes` defines the myst-spec-aligned pydantic
node vocabulary plus the `Doc` wrapper; `bridge` maintains the bijective mapping between
markdown-it token streams and `Doc` trees (`to_tokens(from_tokens(T)) == T` for every stream
the markdown readers produce); `walk` provides visitors, transforms, and node addressing. Nodes
are pure data -- every operation on them lives here or in the readers/writers around them.

```{eval-rst}
.. automodule:: myform.model
   :members:
   :imported-members:
```