This extension hook has no documentation on MediaWiki.org. Please improve MediaWiki by adding documentation to it. See Template:ExtensionHook for instructions on how to do it.

For examples of extensions using this hook, see Category:NamespaceManagerAfterAddNamespace extensions . Category:Extension hooks#NamespaceManagerAfterAddNamespace Category:Undocumented extension hooks#NamespaceManagerAfterAddNamespace Category:Extension hooks provided by BlueSpiceNamespaceManager Category:Extension hooks#NamespaceManagerAfterAddNamespace Category:Undocumented extension hooks#NamespaceManagerAfterAddNamespace Category:Extension hooks provided by BlueSpiceNamespaceManager