This is the documentation page for the main data module for Module:category tree. This module does not contain data itself, but rather imports the data from the category tree submodules, and applies some post-processing. For an introduction to the category tree, and details on how to add new categories to the tree, see the documentation for Module:category tree.

• To find which submodule implements a specific category, use the search box on the right.
• To add a new submodule, copy an existing submodule and modify its contents. Then, add its name to the subpages list at the top of Module:category tree/data.