CMS Architecture in 1.5 and 1.6

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The 1.5 and 1.6 versions of the Joomla! CMS are based on a three-tiered system that consists of the following:

Joomla! 1.5 Architecture
  1. The top, Extensions layer, consists of Extensions to the Joomla Framework and its applications:
  2. The middle, Application layer, consists of applications that extend the Framework JApplication class. Currently, there are four applications included in the Joomla distribution:
    • JInstallation is responsible for installing Joomla on a web server and is deleted after the installation procedure has been completed.
    • JAdministrator is responsible for the back-end website administration.
    • JSite is responsible for the front-end of the website.
    • XML-RPC supports remote administration of the Joomla website.
  3. The bottom, Framework layer, consists of:

Further Reading

  1. See also Platform
  2. Joomla! Framework vs Joomla! Platform