Why Domains?
What makes YounndAI Domains different from Schema.org, FHIR, and other standards.
There are many standards for describing data. What makes YounndAI Domains different?
The Comparison
What's Novel
1. Cross-Industry by Default
Schema.org is broad but shallow. FHIR is deep but healthcare-only. YounndAI Domains is both deep and broad — curated schemas across 31+ industries, each with typed fields and validation rules.
2. AI-First Design
Every schema is designed to be consumed by AI agents at runtime. Fields have types, enums, and required flags — not just labels and descriptions. An agent can parse a schema and immediately use it as tool parameters.
3. DNS-Like Resolution
Request yon.health and get the health domain. Request yon.ecommerce and get the ecommerce domain. The registry works like DNS — a global namespace with predictable resolution.
4. Content-Hashed Immutability
Published versions are locked via content hash. When you pin to [email protected], you get the exact same schema forever. No silent breaking changes.
5. Offline-First Architecture
Every official domain is bundled with the SDK. Air-gapped environments, edge functions, and serverless cold starts all work without network access. The registry API is a convenience, not a dependency.
6. Four-Tier Trust Model
Trust isn't binary. Each domain carries a tier (official, institutional, partner, community), a verified flag, and a conformance score from 0.0 to 1.0. Consumers can set their own trust thresholds — accept only official domains, or include verified community contributions.
❗Important
YounndAI Domains doesn't replace existing standards — it complements them. A FHIR-based healthcare system can expose its data through domains, making it consumable by agents outside healthcare.