Architecture
An overview of the key parts of MediaWiki's source code.
Code | Global object variables | Doxygen-generated documentation
Database layout
Details about the database architecture used by MediaWiki.
MySQL | PostgreSQL | SQLite | IBM DB2 engines
Developing extensions
An overview of the ways to create a new MediaWiki extension.
Hooks | Parser functions | Tag | Special page | Skins
Web access
Details about query string parameters that can be passed to MediaWiki access scripts.
index.php | api.php