{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://paloframework.org/schemas/palo-evidence-evaluation.schema.json",
  "title": "PALO Evidence Evaluation",
  "type": "object",
  "required": ["format", "schemaVersion", "evaluationId", "claimId", "assessmentRunId", "evaluator", "evaluatedAt", "outcome", "quality", "rationale", "inputClaimDigest", "recordDigest", "appendOnly"],
  "properties": {
    "format": { "const": "palo-evidence-evaluation" },
    "schemaVersion": { "const": "1.0.0" },
    "evaluationId": { "type": "string", "pattern": "^evidence-evaluation-[a-z0-9][a-z0-9-]{5,80}$" },
    "claimId": { "type": "string", "pattern": "^evidence-claim-[a-z0-9][a-z0-9-]{5,80}$" },
    "assessmentRunId": { "type": "string", "pattern": "^assessment-run-[a-z0-9][a-z0-9-]{5,80}$" },
    "evaluator": {
      "type": "object",
      "required": ["actorId", "role"],
      "properties": {
        "actorId": { "type": "string", "minLength": 1 },
        "role": { "type": "string", "minLength": 1 }
      },
      "additionalProperties": false
    },
    "evaluatedAt": { "type": "string", "format": "date-time" },
    "outcome": { "enum": ["sufficient", "partial", "insufficient", "unverified"] },
    "quality": {
      "type": "object",
      "required": ["relevance", "integrity", "recency", "independence"],
      "properties": {
        "relevance": { "$ref": "#/$defs/score" },
        "integrity": { "$ref": "#/$defs/score" },
        "recency": { "$ref": "#/$defs/score" },
        "independence": { "$ref": "#/$defs/score" }
      },
      "additionalProperties": false
    },
    "rationale": { "type": "string", "minLength": 1 },
    "inputClaimDigest": { "$ref": "#/$defs/digest" },
    "recordDigest": { "$ref": "#/$defs/digest" },
    "appendOnly": { "const": true }
  },
  "$defs": {
    "score": { "type": "number", "minimum": 0, "maximum": 1 },
    "digest": { "type": "string", "pattern": "^sha256:[a-f0-9]{64}$" }
  },
  "additionalProperties": false
}