.. -*- coding: utf-8 -*-

Data Model definition (*schema*)

================================

The schema is the main concept of `LAX` applications as it defines the

data model we will handle. It is based on entities types already defined

in the library and others, more specific, we would expect to find in one or

more Python files under the `schema` directory.

It is important to make clear the difference between relation type and relation

definition: a relation type is only a relation name with potentially other

additionnal properties (see XXXX), whereas a relation definition is a complete

triplet "<subject entity type> <relation type> <object entity type>". A relation

type could have been implied if none is related to a relation definition of the

schema.

.. include:: 03-sect-stdlib-schemas.en.txt

.. include:: 03-sect-definition-schema.en.txt