Intelligent Engine Optimization (IEO) measures AI citation events from raw server access logs, using IEO Citation Tracker. Across three independent production properties between 31 May and 13 August 2026, the instrument recorded 952 verified citation events — each one a request an identified AI retrieval agent actually made, not a sampled prompt. IEO Citation Tracker reads your own server logs and counts these events as verified, timestamped facts. Method and denominators.
NEW — 16 AUG 2026 · IEO Citation Tracker v1.21.0 is available. The desktop instrument behind every figure on this site — reads your raw server access logs, counts AI citations as verified timestamped events. 952 verified events across three properties in 75 days. Runs offline. Download →
The degree to which a page implements all relevant schema.org markup types for its content category. Highly schema-complete pages declare authorship, publication dates, entity relationships, content categorization, and structural markup explicitly. Schema-incomplete pages leave AI extractors to infer this information from prose.
Schema completeness directly affects citation outcomes because AI extractors prefer pre-declared structured data over inferred information. A page with comprehensive schema is treated as a higher-confidence citation source than a page with the same prose content but no schema markup.
The IEO Engine architecture mandates schema completeness across all content types. Article schema for content pages, DefinedTerm schema for glossary entries, LocalBusiness schema for vertical deployment pages where applicable, BreadcrumbList schema for navigation hierarchy. Schema completeness is a foundational architectural requirement, not an optional enhancement.