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To define a specific hierarchy tree for a library, create an override in the library settings.

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The order of loading the hierarchy:

1. use hierarchy defined in the library hierarchy overwrite

2. if not found, use hierarchy defined with environment variable (DASELEMENT_HIERARCHY)

3. if not found, use hierarchy defined with environment variable in global resources folder (DASELEMENT_RESOURCES)

4. if not found, use default hierarchy of the installed Das Element version

Edit the hierarchy tree

Each category has the following fields: an ID (by default, the Wikidata ID), a human-readable label, a description text, and synonyms.

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