{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "ocr_failures.v1",
  "type": "object",
  "properties": {
    "schema_version": { "const": "ocr_failures.v1" },
    "doc_id": { "type": ["string", "null"] },
    "failure_count": { "type": "integer" },
    "failures": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "ts": { "type": "string" },
          "page": { "type": "integer" },
          "ms": { "type": "integer" },
          "reason": { "type": "string" },
          "image_byte_size": { "type": ["integer", "null"] }
        }
      }
    }
  },
  "required": ["schema_version", "failure_count", "failures"]
}