Category:Tracking category for Sister project links

It is used to build and maintain a list or lists of pages—primarily for the sake of the lists themselves and their use in article and category maintenance. It is not part of the encyclopedia's categorization scheme.
Tracking categories for Template:Sister project links

More information:

This category is hidden on its member pages—unless the corresponding user preference (Appearance → Show hidden categories) is set.
These categories are used to track, build and organize lists of pages needing "attention en masse" (for example, pages using deprecated syntax), or that may need to be edited at someone's earliest convenience.
These categories also serve to aggregate members of several lists or subcategories into a larger, more efficient list (discriminated by classifications).
Typically, tracking categories are automatically populated by templates invoked in pages or by the MediaWiki software (see Special:TrackingCategories for an overview of the latter).

This is a container category. Due to its scope, it should contain only subcategories.

Administrators: Please do not delete this category as empty!
This category may be empty occasionally or even most of the time.

Subcategories

This category has the following 7 subcategories, out of 7 total.

P

Pages using Sister project links with default search (4,282 P)
Pages using Sister project links with hidden wikidata (6,412 P)
Pages using Sister project links with unknown parameters (empty)
Pages using Sister project links with wikidata mismatch (565 P)
Pages using Sister project links with wikidata namespace mismatch (1,055 P)
Pages with empty sister project links (61 P)
Pages with single-entry sister bar (132 P)