Editing Help:Link (section)

== Subpage links ==
A wikilink needs a <kbd>[[''fullpagename'']<nowiki />]</kbd>, and this is not optional
except when it links to or from a [[Help:subpage|subpage]].
A wikilink to its parent page is <kbd>[[../]]</kbd>,
and, although no page name is given, the [[wp:pgn|fullpagename]] is rendered.
On the parent a wikilink to a subpage can use <kbd>[[/''subpagename'']<nowiki />]</kbd> to render a subpagename instead.

Although subpages are created in article space, 
subpage linking does not fully function there.
 
Subpage linking works as expected to link to any pages under a root parent page:
* section linking: <kbd>[[../#''section'']]</kbd>
* child-to-child subpage linking: <kbd>[[../''[[wp:pgn#Subpagename_and_basepagename|subpagename]]'']<nowiki />]</kbd>
* parent's parent <kbd>[[../../]]</kbd>
* including the <kbd>[[../{{!}}[[wp:pipe trick|''pipe trick'']]</kbd>
* and including [[help:transclusion|transclusion]]s: <kbd>{{../}<nowiki />} </kbd> and <kbd>{{/''subpagename''}<nowiki />} </kbd>

Consider that there are about 140 {{search link|prefix:Wikipedia: Manual of style/|subpages of the ''Manual of style''}} arranged in 97 branches, 35 of which have two subpages, and 5 of which have three subpages. Subpage links save typing. Say you're editing this closely related group of fullpagenames:

:[[Wikipedia:Manual of Style/Accessibility/Signatures]] 
:[[Wikipedia:Manual of Style/Accessibility/Data tables tutorial]] 
:[[Wikipedia:Manual of Style/Accessibility/Data tables tutorial/Internal guidelines]]

{| class="wikitable"
|-
! On subpagename !! You type!! You get!! Links to
|-
| Data tables tutorial || <code>[[../]<nowiki />]</code> || {{font color|blue|Wikipedia:Manual of Style/Accessibility}} || Parent
|-
| Internal{{zwsp}}guidelines || <code>[[../../]]</code> || {{font color|blue|Wikipedia:Manual of Style/Accessibility}} || Grandparent
|-
| Accessibility || <code>[[/Signatures]<nowiki />]</code> || {{font color|blue|/Signatures}}|| Child
|-
| Accessibility || <code>[[/Signatures<mark>/</mark>]<nowiki/>]</code> || {{font color|blue|Signatures}}|| Child 
|-
| Data tables tutorial || <code>[[../Signatures]<nowiki />]</code> || {{font color|blue|Wikipedia:Manual of Style/Accessibility/Signatures}}|| Sibling
|-
| Data tables tutorial || <code>[[../Signatures/]<nowiki />]</code> || {{font color|blue|Signatures}}|| Sibling
|-
| Internal{{zwsp}}guidelines || style=white-space:nowrap | <code>[[../../Signatures]<nowiki />]</code> || {{font color|blue|Wikipedia:Manual of Style/Accessibility/Signatures}}|| Uncle
|-
| Signatures || style=white-space:nowrap | <code>[[../Data tables tutorial/Internal guidelines]<nowiki />]</code> || {{font color|blue|Wikipedia:Manual of Style/Accessibility/Data tables tutorial/Internal guidelines}}|| Nephew
|}

To see this page's array of subpage variables and markup four levels deep, see [[/one/two/three/four]], and from there go to level two at ''one/two''.

Markup <kbd>[<nowiki />[../]]</kbd> addresses the ''basepagename'', except when a ''pagename'' includes a <kbd>/</kbd> slash character (allowed), the basepagename/subpagename variables' characters are skewed. To see all this, and how adding an extra <kbd>../</kbd> construct fixes the resulting [[wp:redlink|redlink]], see [[/sub/page/name1/sub/page/name2/subpage level 3]], and from there go to ''sub/page/name2''.

Note that the top of every subpage shows the [[breadcrumb (navigation)|navigation links]] to all ''parent'' subpagenames. From these you can easily gauge levels and linking constructs.

For more information:
* See [[Wikipedia:Page name#Subpagename and basepagename]].
* ''Create'' a subpage by using a ''[[Help:red link|red link]]''.
* See [[m:Help:Link#Subpage feature]].
* See examples at [[m:Link/a/b]] and [[m:Help:Link/a/b]].