.. include:: /Includes.rst.txt
.. index::
   Extension development; Concepts
.. _extension-concepts:

==============================
Concepts
==============================

Learn about the concept of extensions
in TYPO3, the difference between system extension and local
extensions. Learn about Extbase as an MVC basis for extension
development.

.. toctree::
   :titlesonly:
   :glob:

   Introduction
   SystemAndLocalExtensions
   FurtherReading