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The Organization of Wikimedia

Wikimedia is made up of a collection of websites known as Wikimedia Projects, which together make up the core of the Wikimedia movement. These websites use a piece of open source software called MediaWiki.

What is a Wikimedia Project?

A Wikimedia Project is one of the several collaborative initiatives that are developed by users around the world. These include projects like each language Wikipedia, Wikimedia Commons, Wiktionary, and many others.

What is a Project Namespace?

Within each Wikimedia Project, webpages are categorized and stored by namespace. For example, in the English Wikipedia, all article pages are grouped into one namespace while all talk pages are grouped into another.

Each Wikimedia project has a different set of namespaces. The number of namespaces also varies from project to project but each has more than ten.

Wikimedia Projects
English Wikipedia
Spanish Wikipedia
German Wikipedia
(+ many other language Wikipedias)
Wikimedia Commons
Project Namespaces
Example for English Wikipedia only
0: Article namespace
1: Talk page
2: User
3: User Talk, etc.
4: Media
More on Namespaces...