**********
Chapter 18
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Redefining and overriding schema components
===========================================

Example 18-1 A simple redefinition
**********************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18011.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18011.py
   :language: python

Example 18-1 A simple redefinition
**********************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18012.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18012.py
   :language: python

Example 18-2 Redefining a simple type
*************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18021.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18021.py
   :language: python

Example 18-2 Redefining a simple type
*************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18022.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18022.py
   :language: python

Example 18-3 Redefining a complex type
**************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18031.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18031.py
   :language: python

Example 18-3 Redefining a complex type
**************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18032.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18032.py
   :language: python

Example 18-4 Redefining a named model group as a subset
*******************************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18041.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18041.py
   :language: python

Example 18-4 Redefining a named model group as a subset
*******************************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18042.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18042.py
   :language: python

Example 18-5 Redefining a named model group as a superset
*********************************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18051.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18051.py
   :language: python

Example 18-5 Redefining a named model group as a superset
*********************************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18052.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18052.py
   :language: python

Example 18-6 Redefining an attribute group as a subset
******************************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18061.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18061.py
   :language: python

Example 18-6 Redefining an attribute group as a subset
******************************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18062.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18062.py
   :language: python

Example 18-7 Redefining an attribute group as a superset
********************************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18071.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18071.py
   :language: python

Example 18-7 Redefining an attribute group as a superset
********************************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18072.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18072.py
   :language: python

Example 18-8 A simple override
******************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18081.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18081.py
   :language: python

Example 18-8 A simple override
******************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18082.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18082.py
   :language: python

Example 18-9 Overriding a simple type
*************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18091.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18091.py
   :language: python

Example 18-9 Overriding a simple type
*************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18092.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18092.py
   :language: python

Example 18-10 Overriding a complex type
***************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18101.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18101.py
   :language: python

Example 18-10 Overriding a complex type
***************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18102.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18102.py
   :language: python

Example 18-11 Overriding element and attribute declarations
***********************************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18111.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18111.py
   :language: python

Example 18-11 Overriding element and attribute declarations
***********************************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18112.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18112.py
   :language: python

Example 18-12 Overriding named groups
*************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18121.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18121.py
   :language: python

Example 18-12 Overriding named groups
*************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18122.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18122.py
   :language: python

Example 18-13 Risks of overriding types
***************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18131.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18131.py
   :language: python

Example 18-13 Risks of overriding types
***************************************

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18132.xsd
   :language: xml
   :lines: 3-

.. literalinclude:: /../tests/fixtures/defxmlschema/chapter18/example18132.py
   :language: python

.. admonition:: Samples Source
    :class: hint

    `Definitive XML Schema <http://www.datypic.com/books/defxmlschema/>`_
    by Priscilla Walmsley (c) 2012 Prentice Hall PTR