---
title: "tx_*"
manual: "TypoScript Explained"
version: "13.4"
permalink: "https://docs.typo3.org/permalink/t3tsref:page-tsconfig-extension-namespace@13.4"
source: "PageTsconfig/Tx.rst"
rendered: "2026-09-18T10:44:33+00:00"
---

# tx\_\* {#page-tsconfig-extension-namespace}

The `tx_` prefix key is not used in the Core itself, and is just a
reserved space for extensions to never collide with core options, a
use case could be `tx_news` for the news extension. Extension developers
should create a key like that: `tx_[extension key with no underscore]`