# Schemas

# Schemas

Schemas are how AIEP becomes deterministic. They allow different systems to agree on whether an artefact is structurally valid before it is relied upon.

AIEP uses schemas to reduce ambiguity, increase reproducibility, and support safe automated retrieval.

## What this Hub publishes

This Hub publishes schemas under:

`/.well-known/aiep/schemas/`

These include schemas for:
- metadata declarations
- innovation ledger entries
- certificate artefacts
- audit event records

## Why schemas matter

Without schemas, machines interpret structure by inference. That is fragile. With schemas, machines can validate structure and fail closed when required fields are missing.

Schemas do not prove truth. They prove structure. Structure is the foundation that makes evidence and governance usable at scale.