Categories

The index of the atlas's own structural categories, the pages this entity itself belongs to alongside every other category the atlas has minted. It exists so the category layer is browsable like any other part of the atlas, not because a category is a subject of study in its own right, and a reader arriving here sees the full list of category pages rather than any one subject's own entries. It excludes every entity that is not itself a category, section or subcategory node, and excludes the individual entities a category page lists, which belong under their own substantive types.