|This is a container category. Due to its scope, it should contain only subcategories.|
This is the top level of Wikipedia's category system (which is why it has no parent category). Its subcategories contain various types of encyclopaedic content (e.g. articles and glossaries), content that assists with the navigation of the encyclopaedia (e.g. indexes and portals), as well as pages related to the maintenance of the encyclopaedia (e.g. Wikipedia administration and WikiProjects).