Categories in MediaWiki are used to group similar pages, and groups of similar groups, together to form one or more tree-like hierarchies.
Database
MediaWiki keeps category data in the category and categorylinks tables.
API
Several API modules provide access to category information: API:Categories, API:Categoryinfo, API:Allcategories, and API:Categorymembers.
User interface
- Special:Categories lists all categories which have at least one page.
- Special:RandomInCategory
A number of category extensions are available; one of the more popular ones, CategoryTree, provides a dynamic view of the wiki's category structure as a tree.
See also
- Help:Categories
- Help:Tracking categories
- #MediaWiki-Categories on Phabricator
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