Formula:In subpagina aut alibi

Hanc paginam, in spatio Formulae nominali, oportet Latine convertere.

De usu

This template checks whether the current page is a subpage or not. A subpagina is a page that has a slash:

[[Template:Parentpage/Subpage]]

Exception: in article space (mainspace) the slash is part of the title, and there are no subpages. Example, AC/DC is a parent page not a subpage.

Usage example: both Template:Infobox element isotopes and Template:Infobox element isotopes/infotable use documentation page Template:Infobox element isotopes/doc. We only want to categorise the parent page. So in the /doc page we add:

{{In subpagina aut alibi||[[Category:Chemical element infobox]]}}

Note: WP:Subpage uses an other definition than magic word {{SUBPAGENAME}}. This template uses the former definition (pagename has an after-slash part).

{{In harenario aut alibi}} — Distinguishes between the /sandbox subpages and the root template page and other subpages.
{{In periclitationibus aut alibi}} — Distinguishes between the /testcases subpages and the root template page and other subpages.
{{In formula aut alibi}} — Distinguishes between pages in the template namespace and other namespaces.
{{Si in pagina basilari}} — Distinguishes between the root template page and subpages, without special consideration in the mainspace.
{{Si in prospectu}} — Distinguishes between the previewed page and the saved page
{{In subpagina aut alibi}} — Distinguisheds between the root page and subpages (any subpage), classifying pagenames in the mainspace with a slash as being the root page.

Documentatio pristina transclusa est ex Formula:In subpagina aut alibi/doc. (recense | historiam inspice)
Quaesumus auctores experturos esse in harenarii (crea | effinge) ac periclitationum (crea) subpaginis huius formulae.
Lubet categorias et nexus in /doc subpaginam addere. Vide etiam subpaginas huius formulae.