{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Textphotos image sample",
  "description": "Public image-sample contract. Review state is explicit; numeric model confidence is not a calibrated accuracy guarantee.",
  "type": "object",
  "required": ["id", "image", "width", "height", "primary_language", "language_status", "regions", "ocr_text"],
  "properties": {
    "id": {"type": "string"},
    "image": {"type": "string"},
    "width": {"type": "integer", "minimum": 1},
    "height": {"type": "integer", "minimum": 1},
    "primary_language": {"enum": ["en", "ru", "zh", "ar", "hi", "es", "he", null]},
    "languages": {"type": "array", "items": {"enum": ["en", "ru", "zh", "ar", "hi", "es", "he"]}},
    "language_status": {"enum": ["confirmed", "uncertain"]},
    "domain": {"type": ["string", "null"]},
    "text_types": {"type": "array", "items": {"type": "string"}},
    "word_count": {"type": "integer", "minimum": 0},
    "char_count": {"type": "integer", "minimum": 0},
    "text_area_ratio": {"type": "number", "minimum": 0, "maximum": 1},
    "core_status": {"enum": ["verified", "machine"]},
    "review_status": {"enum": ["ai_visual_review", "machine"]},
    "ocr_text": {"type": "string"},
    "sha256": {"type": "string", "pattern": "^[a-f0-9]{64}$", "description": "SHA-256 of the served image file."},
    "regions": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["id", "text", "polygon"],
        "properties": {
          "id": {"type": "string"},
          "text": {"type": "string"},
          "polygon": {"type": "array", "minItems": 3, "items": {"type": "array", "minItems": 2, "maxItems": 2, "items": {"type": "number"}}},
          "confidence": {"type": ["number", "null"], "minimum": 0, "maximum": 1},
          "language": {"enum": ["en", "ru", "zh", "ar", "hi", "es", "he", null]},
          "tiny": {"type": ["boolean", "null"]}
        }
      }
    }
  }
}