Editing MycoTaxa:Namespace (section)

===Former namespaces===
The following namespaces previously existed but no longer do:

*'''[[Wikipedia:Flow|Flow namespace]]''' (prefix '''Topic:''') was a proposed talk page replacement, formerly installed on English Wikipedia by [[mw:Extension:StructuredDiscussions|Extension:StructuredDiscussions]]. It is no longer installed after being rejected by the community.
* '''[[Wikipedia:Course pages|Education Program namespace]]''' (prefix '''Education Program:'''): uninstalled in 2018, and replaced with the [[wmfdashboard:|Programs & Events Dashboard]].<ref>[[outreach:Education/News/January 2018/Education Extension scheduled shutdown|Education Extension scheduled shutdown]], Wikimedia outreach</ref><ref>{{Section link|Wikipedia:Education noticeboard/Archive 18#NOTICE:_EducationProgram extension is being deprecated}}</ref> However, the namespace was re-added later that year to allow access to old talk pages in the Education program talk: namespace. The namespace was then uninstalled again in 2021 after the remaining talk pages were moved to subpages of [[Wikipedia talk:Education program archive]].
* '''[[Wikipedia:Books|Book namespace]]''' (prefix '''Book:'''): contained entries for Wikipedia books, collections of articles about one theme, which were used to generate downloadable files or printable documents or order books from PediaPress. In 2017, the online book rendering service was withdrawn, leading to the removal of most links leading to the namespace in 2019. The namespace and its transclusions were still retained in the hope that the WMF would come up with a solution,<ref>{{Section link|Wikipedia:Village pump (technical)/Archive 176|Suppress rendering of Template:Wikipedia books}}</ref> but in 2021 the namespace was uninstalled after all remaining books were moved to subpages of [[Wikipedia:Books/archive]].
* '''Gadget namespace''' (prefix '''Gadget:'''):<ref>{{Section link|Wikipedia:Village pump (technical)/Archive 139#New "Gadget:" and "Gadget definition:" namespaces?}}</ref> was intended to store [[Wikipedia:Gadget|Gadgets]], which are small [[Snippet (programming)|snippets]] enabled in [[Special:Preferences#mw-prefsection-gadgets|user preferences]], but was never used for anything other than redirects to the video game ''[[Gadget: Invention, Travel, & Adventure]]'', and for most of its existence could only be edited by WMF staff. Gadgets currently use the [[Help:MediaWiki namespace|MediaWiki namespace]] with the ''MediaWiki:Gadget-'' page name prefix. It was a [[mw:Manual:Using custom namespaces|custom namespace]] installed by the [[mw:Extension:Gadgets|Gadget extension]].
* '''Gadget definition namespace''' (prefix '''Gadget definition:'''): installed but never used; see above for more information. Gadget definitions currently use the [[MediaWiki:Gadgets-definition]] page.