{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Controversy matrix row",
  "type": "object",
  "required": ["id", "issue", "sources", "status"],
  "properties": {
    "id": {"type": "string"},
    "issue": {"type": "string"},
    "claimant": {"type": ["string", "null"]},
    "opposing_position": {"type": ["string", "null"]},
    "supporting_evidence": {"type": "array", "items": {"type": "string"}},
    "sources": {"type": "array", "items": {"type": "string"}},
    "status": {"enum": ["open", "decided", "uncertain", "not_identified"]}
  },
  "additionalProperties": false
}