Six foundational rules.
Zero exceptions.
These aren't aspirations or guidelines — they're the non-negotiable architecture of truth in commerce. Every decision, every data structure, every line of specification traces back to these six principles.
Accuracy takes absolute priority over conversion rates, search rankings, or performance metrics. If truth and optimization conflict, truth wins. Always.
Nothing important is inferred. States, attributes, constraints, and evidence must be declared. What you see is what exists. No hidden defaults, no silent assumptions.
Meaningful claims require verifiable proof. Self-declarations are accepted but clearly labeled. Third-party verification elevates trust. Certification seals it.
Merchants own their data. They can export it, migrate it, and maintain complete control. No platform lock-in. No vendor dependency. Your truth travels with you.
Every change is tracked. Every claim has provenance. Manipulation is visible. The system doesn't just enable transparency — it enforces it.
Works across all industries, platforms, and languages. Grows through extensions without breaking the core. From handmade candles to jet engines.
13 layers.
One complete truth.
Every product entity in UCDM is composed of 13 semantic layers. Each layer represents a distinct domain of truth — from immutable identity to AI-optimized summaries. Together, they form the complete, verifiable representation of what a product is, what it costs, and what you can trust about it.
Four evidence levels.
Progressive verification.
UCDM's evidence framework provides a clear, machine-readable trust signal for every product claim. From basic self-declarations to cryptographically verifiable credentials.
Merchant provides claim without external verification
Supporting documentation attached to claim
Independent authority validates claim
W3C Verifiable Credential issued
{
"evidence": {
"material_claim": {
"level": "E2",
"verifier": "SGS Testing Services",
"credential_uri": "https://vc.sgs.com/2026/mat-7721",
"verified_at": "2026-01-15T10:30:00Z"
}
}
}Built for the entire commerce ecosystem.
UCDM isn't built for one stakeholder — it's designed to serve every participant in the commerce ecosystem. From merchants to regulators, from AI agents to everyday humans, everyone benefits when product data is truthful, structured, and verifiable.
Compete on truth, not manipulation. UCDM transforms your catalog into a verified trust asset that AI agents prefer and consumers believe.
Get CertifiedJSON Schema, JSON-LD, REST APIs. Build on a semantic foundation that works across every platform, protocol, and programming language.
Start BuildingLayer 13 LLM Cards. Evidence-scored claims. Structured reasoning data. Make purchasing decisions on data you can actually trust.
Integrate UCDMUCDM extends, complements, and integrates with existing standards. Built to work with Schema.org, GS1, W3C, IETF, and UN/CEFACT.
CollaborateEU Digital Product Passport ready. UNTP aligned. Every claim auditable, every change tracked, every evidence level transparent.
Review ComplianceStructured, semantic, crawlable product data that actually means what it says. Better indexing. Better results. Better commerce.
Index UCDM DataWhen someone asks 'Is this jacket really waterproof?' — UCDM provides the verified answer, not the marketing copy.
Connect8 billion people deserve to know what they're actually buying. UCDM is the foundation that makes that possible. This belongs to you.
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