MediaWiki is the software which powers many websites which serve collaborative projects. The software was originally created to power Wikipedia, and, as it is [[free software]], is now used to power many other sites. As Wikipedia is an extremely high-traffic website, MediaWiki is highly optimized for preformance .
==Namespaces in MediaWiki==
MediaWiki divides pages into logical subdivisions by means of [[namespace|namespaces]], which, in MediaWiki, are denoted by a text string, descriptive of the purpose of the page, followed by a colon, all of which preceeds the title. This yields titles in the form of ''Namespace:Title''. Different properties apply to different namespaces. The only exception to the naming scheme is that of the main namespace, which has no prefix .