{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://platoskallipolis.com/schemas/public-resource-reuse-proof.v1.json",
  "title": "Plato's Kallipolis Public Resource Reuse Proof",
  "type": "object",
  "additionalProperties": false,
  "required": ["schema", "citationId", "resourceContentHash", "reuseType", "usedAt", "visibility"],
  "properties": {
    "schema": {"const": "kallipolis.public-resource-reuse-proof.v1"},
    "citationId": {"type": "string", "pattern": "^urn:platos-kallipolis:resource:resource\\.[a-z0-9.-]+:version:[0-9]+\\.[0-9]+\\.[0-9]+:digest:sha256:[a-f0-9]{64}$"},
    "resourceContentHash": {"type": "string", "pattern": "^sha256:[a-f0-9]{64}$"},
    "reuseType": {"enum": ["quoted", "transformed", "linked", "integrated"]},
    "usedAt": {"type": "string", "format": "date-time"},
    "visibility": {"const": "public"}
  }
}