fix interface_selector bug
If a view using this selector defines an `accepts` attribute, the
view should be selectable only if the entity is of one of the
accepted types (+need to consider schema inheritance)
.. -*- coding: utf-8 -*-
Data model definition (*schema*)
================================
The schema is the core piece of a `CubicWeb` application as it defines
the data model handled. It is based on entities types already defined
in the `CubicWeb` standard library and others, more specific, we would
expect to find in one or more Python files under the `schema` directory.
At this point, 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:: B021-schema-stdlib.en.txt
.. include:: B022-schema-definition.en.txt