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

     2 

     3 Data model definition (*schema*)

     4 ================================

     5 

     6 The schema is the core piece of a `CubicWeb` application as it defines

     7 the data model handled. It is based on entities types already defined

     8 in the `CubicWeb` standard library and others, more specific, we would 

     9 expect to find in one or more Python files under the `schema` directory.

    10 

    11 At this point, it is important to make clear the difference between

    12 relation type and relation definition: a relation type is only a relation

    13 name with potentially other additionnal properties (see XXXX), whereas a 

    14 relation definition is a complete triplet 

    15 "<subject entity type> <relation type> <object entity type>". 

    16 A relation type could have been implied if none is related to a 

    17 relation definition of the schema.

    18 

    19 

    20 .. include:: B021-schema-stdlib.en.txt

    21 .. include:: B022-schema-definition.en.txt

    22