Principlev1PR-384
Layer facets, tags, or cross-references on top…
Layer facets, tags, or cross-references on top of hierarchical taxonomies to handle items that legitimately span multiple branches, using hierarchy for primary navigation and facets for multi-dimensional access.
Why This Is a Principle
Derives from chunking/hierarchy (Hierarchical Chunking Expands Capacity) and schema structure (Schemas as Knowledge Organization Structures). Prescribes how to resolve the tension between strict hierarchical classification and multi-membership reality.