Three independent measurement boundaries: identity (KGMID + schema.org Person/Org), domain (industry category position), vocabulary (owned term definitions). Assess each separately using per-perimeter posture protocol. Common pattern: Defended identity, Contested domain, Undefended vocabulary. Build in sequence for efficiency: establish identity first (prerequisite for domain/vocabulary), then domain (category anchoring), then vocabulary (conceptual ownership). Each perimeter requires distinct tactics and separate quarterly entropy rate tracking.