Template:Category see also if exists/doc

Displays a "see also" link to one or more categories, if the category exists. If none of the supplied categories exists, the template does nothing.

It allows the creation of links to categories which do not yet exist, but which will be displayed if and when the category is created. This is useful as a category tree is being developed, because the editor does not have guess whether a target category is likely to exist any time soon. The link can be created now, rather than having to edit the page again later.

Usage

 * Usual syntax

Parameters: → →  →
 * At least one category name
 * Examples
 * 1) A category which does exist:
 * 1) A non-existent category:
 * 1) A set of categories, some of which exist:

Many (most?) sports are segregated by gender. In those sports, men and women either compete separately, or some in specified combination, e.g. in tennis a mixed doubles team must consist of one man and one woman.
 * Pragmatic example:

WP:Cat gender therefore allows the categories for players of those sports to be sub-divided by gender: one category for men, and one for women.

One such divide is Category:Male boxers/Category:Women boxers.

Category:Estonian boxers has a subcategory for Category:Estonian male boxers, but since there are as yet no en.wikipedia articles on women boxers from Estonia, we do not yet have a Category:Estonian women boxers. So on Category:Estonian male boxers, there is:

Warning messages
If none of the listed categories currently exists, then a warning message is displayed when the page is being previewed:

This warning is displayed just below the "Preview" heading, and just above the page preview area. It is not displayed when the page has been saved

Redirects

 * Cat see also if exists