Four-part citability standard for AI. Entity (named, disambiguated) + Attribute (specific property) + Value (concrete claim) + Evidence (verifiable proof). Fail example: “We improve outcomes.” Pass example: “Acme Corp reduces deployment time to 24hrs (validated by 150 implementations in 2025 case library).” Audit all content quarterly for EAV-E compliance. Non-compliant content won’t be cited even with tier-1 corroboration. Use for: content guidelines, writer training, corroboration campaign QA. EAV-E compliance is citation engineering prerequisite. Measure: % of core claims passing EAV-E.