1 Data model

     2 ==========

     3 

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

     5 

     6 .. toctree::

     7    :maxdepth: 1

     8 

     9    definition

    10    metadata

    11    baseschema

    12 

    13 .. comment:    define-workflows