How Sulu is structured?
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This graphic shows how the core of Sulu is setup.

.. image:: ../../img/system-architecture.png
    :align: center
    :alt: Sulu System Architecture


Data
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Symfony uses PHPCR, Doctrine and MySQL, MariaDB or Jackrabbit.


Basic Frameworks
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Sulu is based on Symfony and the Symfony CMF.


Sulu
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Everything else is Sulu. In the next step there is more information
about the components.