Category tests

Category pages contain a list of pages that have been categorized under that category.

Pages are added to a category using. This will add the page name to an alphabetized list found on the category page. Any special characters appearing within the page name will affect the categorization.

If a page name begins with a non-alphabetic character, and you wish that character to be ignored, you must add a sortkey using. A sortkey could be a single space, the pagename with all the special characters stripped from it, or anything the editor desires.

I have tested a number of sortkeys, to see the order in which they display on the category page. See Category:Cat test

In my testing, I discovered that these non-alphabetic characters cannot be part of a pagename. However, they can be used as sortkeys : Should you wish to organize page names a bit on the category page, for example, listing all sub-categories first, and then all group-pages, it is beneficial to understand how the sortkey-headers will be listed on the page. From top-to-bottom, left-to-right: !"#$%&'*+,-./0-9:;<=>?@A-Z[\]^_{|}~ ' and ` both fall under ' (a space) as a sortkey will list the page under an untitled header at the top of the category page.   as a sortkey will list the page under an untitled header at the bottom of the category page. Case within a sortkey seems to have some effect, however more testing would need to be done to find a pattern.
 * # (used to link to ids)
 * _ (treated as a space, stripped from end of page titles)
 * []
 * {}
 * \ (this will convert into a / )
 * \ (this will convert into a / )
 * \ (this will convert into a / )