[dataimport] dispatch and deprecate old code previously, the whole dataimport.py content has been copied in dataimport/__init__.py, then dataimport/importer.py API has been introduced. Following these changes, this cset: * dispatch __init__ code into sub-modules * dispatch unittest_dataimport accordingly * deprecates functions and classes that are deprecated by the new API Related to #5414753.

Data model
==========

This chapter describes how you define a schema and how to make it evolves as the time goes.

.. toctree::
   :maxdepth: 1

   definition
   metadata
   baseschema
   define-workflows