Define Taxonomy

Multi-level classification scheme. Categories at the top, tags or sub-categories beneath.

When to use

• "I want a hierarchy, not a flat list."
• "Categories, tags, AND sub-categories."
• "Organize this corpus the way Wikipedia does — top-level, then subsections."

Design choices to confirm first

• Depth: 2 levels (category → sub) or 3 (category → tag → sub)?
• Exclusivity: is a doc in exactly one category (tree)? Or can it live under multiple categories with tags as a free set (facet)?
• Target counts: how many top-level? How many per level? (Typical: 8-15 top, 3-8 per branch.)

Procedure