---
title: "Documentation"
manual: "TYPO3 Explained"
version: "14.3"
permalink: "https://docs.typo3.org/permalink/t3coreapi:extension-files-documentation@14.3"
source: "ExtensionArchitecture/FileStructure/Documentation/Index.rst"
rendered: "2026-10-01T15:20:05+00:00"
---

# `Documentation` {#extension-files-documentation}

Contains the extension documentation in ReStructuredText (ReST, .rst) format.
Read more on the topic in chapter [extension documentation](https://docs.typo3.org/permalink/t3coreapi:extension-documentation@14.3).
`Documentation/` and its sub folders may contain several ReST files, images and other resources.