To be used in conjunction with {{Non-diffusing subcategory}}

{{Non-diffusing parent category|subcategory|subcategory2|subcategory3|subcategory4}}

subcategory – the subcategory (without the prefix "Category:") that has a non-diffusing relationship with the category that this template is placed on.

subcategory2/3/4 etc – Further subcategories (up to nine) can be listed in the template to document parents that have multiple non-diffusive subcategories.

Single

{{Non-diffusing parent category|Best Actor Academy Award winners}}

produces:

This is a non-diffusing parent category of Category:Best Actor Academy Award winners The contents of that subcategory can also be found within this category, or in diffusing subcategories of it.

Multiple

{{Non-diffusing parent category|Scottish long-distance runners|English long-distance runners}}

produces:

This is a non-diffusing parent category of Category:Scottish long-distance runners and Category:English long-distance runners The contents of these subcategories can also be found within this category, or in diffusing subcategories of it.