This template is meant to be used for content category pages. It produces a box indicating that all articles in the current category should be listed in the category's page, regardless of whether or not they are listed in one or more subcategories. SeeWikipedia:Categorization#Subcategorization for more details. See{{Geography parent category}} for a similar template that lists PetScan queries for use in maintenance.
{{All included|topic}}
{{All included|topic|included}}
{{All included|American film actors}}{{All included|American film actors|actors}}