Editing MycoTaxa:Namespace (section)

=== Pseudo-namespaces ===
<!-- This section is linked from [[Wikipedia:Glossary]] -->
{{Shortcut|WP:PNS}}
Apart from Wikipedia's 24 regular namespaces and their aliases, and 2 virtual ones, there are several title prefixes appearing in [[Help:Shortcut|shortcut redirects]] pointing to frequently-referred-to Wikipedia pages. These prefixes are referred to as '''pseudo-namespaces''' and include the following:

* '''[[Special:Prefixindex/CAT:|CAT:]]''' for shortcuts to the [[Wikipedia:Category namespace|Category namespace]]. See also [[:Category:Redirects to category space]]
* '''[[Special:Prefixindex/H:|H:]]''' for shortcuts to the [[Wikipedia:Help namespace|Help namespace]]. See also [[:Category:Redirects to help namespace]]
* '''[[Special:Prefixindex/P:|P:]]''' for shortcuts to the [[Wikipedia:Portal namespace|Portal namespace]]. See also [[:Category:Redirects to portal namespace]]

A more complete list is available at {{Section link|Wikipedia:Shortcut#List of prefixes}}.

Pseudo-namespaces are not in any way recognised by the wiki software; they are purely a community custom. Titles in pseudo-namespaces actually belong technically in the main (article) namespace and are treated as such by the software: they are case-sensitive and appear in [[Help:Search#Syntax|search results]] restricted to the main namespace. An alias is treated like a real namespace, resulting in a search for the [[WP:page name|pagename]] in its namespace, but the "pseudo-namespace:pagename" search is in mainspace, not its pseudo-namespace. For example, searching for "H:S" will not search '''Help'''.

To learn some of these shortcuts, first follow the pseudo-namespace link above, then follow one of the redirects listed on that page. It will take you to the target, where you then notice any {{tl|shortcut}} boxes to the right of the page, which may also list some additional shortcuts to that same area. By observing these steps repeatedly, you can discover ways to shorten your typing. You will use pseudo-namespace names more often if you are an advanced editor, highly active in many namespaces, or constantly linking to pages that have a pseudo-namespace shortcut.

To understand the appropriateness of redirects of this type, see [[Wikipedia:Cross-namespace redirects]]. All shortcuts are discoverable by [[Help:Searching|searching]] for redirects. There is also the category [[:Category:Wikipedia redirects|Wikipedia redirects]].

As a final example, every [[Wikimedia Foundation]] project has a "[[m:Help:Transwiki|Transwiki:]]" pseudo-namespace (sometimes a real namespace) for importing articles manually. A wiki project that would manually move many pages between [[wp:sister|sister projects]] uses this tag. Redirects/shortcuts are not directly involved here, as described above. Instead, the page title is [[WP:move|move]]d to "Transwiki:''namespace:pagename''", and that content is then copied and pasted into a new page name of that temporary title on the target wiki. When it is accepted, the title is then moved out of the '''Transwiki''' pseudo-namespace there and becomes a real page name in its respective namespace.