 this.
    Though I should perhaps make clear some
    distinctions I use related to terms like
    ontology:

MW: Taxonomy, a dictionary of standard terms and their natural language definitions.

MW: Thesaurus, a taxonomy with subtype/supertype relations.

These are not standard uses of these words.  And you can look it up.
Taxonomies in well-developed fields depart significantly from lists
of common names in ordinary language nomenclature.  And that is the
first time I have ever heard that particular usag