The sheer amount of types that the OpenDocument specification describes renders the documentation of the x/odf package quite unmanageable.

We should perhaps reorganize the generated code into an x/odf/internal/odf package and provide some type aliases inside the root x/odf package and a new x/odf/ast one for the nodes.

It would be nice to split the nodes into text, draw, style, ... -related packages but it may prove undoable (because of cyclic imports).