{
    "types": {
        "info": {
            "year": "? : T[integer] | T[string](\"\")",
            "version": "? : T[string]",
            "description": "? : T[string]",
            "contributor": "? : T[string]",
            "url": "? : T[string]",
            "date_created": "? : T[string]"
        },
        "image": {
            "id": "T[integer]",
            "width": "T[integer]",
            "height": "T[integer]",
            "file_name": "T[string]",
            "license": "? : T[integer]",
            "flickr_url": "? : T[string]",
            "coco_url": "? : T[string]",
            "date_captured": "? : T[string] | T[integer](0)"
        },
        "license": {
            "id": "T[integer]",
            "name": "T[string]",
            "url": "T[string]"
        },
        "annotation": {
            "id": "T[integer]",
            "image_id": "T[integer]",
            "category_id": "T[integer]",
            "segmentation": "? : T[RLE] | [T[polygon]]",
            "area": "? : T[number]",
            "bbox": "? : T[box]",
            "iscrowd": "? : T[integer](E[crowd])"
        },
        "box": [
            "T[number]",
            "T[number]",
            "T[number]",
            "T[number]"
        ],
        "category": {
            "id": "T[integer]",
            "name": "T[string]",
            "supercategory": "? : T[string]"
        },
        "polygon": [
            "T[number]"
        ],
        "RLE": {
            "size": [
                "T[integer]",
                "T[integer]"
            ],
            "counts": "T[string] | [T[integer]]"
        }
    },
    "enums": {
        "crowd": [
            0,
            1
        ]
    },
    "structure": {
        "info": "? : T[info]",
        "images": [
            "T[image]"
        ],
        "annotations": [
            "T[annotation]"
        ],
        "licenses": "? : [T[license]]",
        "categories": [
            "T[category]"
        ]
    },
    "notes": {
        "serialization": "application/json",
        "scope": "COCO dataset annotation structure; prediction-only COCO result lists are a different interface.",
        "numbers": "IDs, years, image dimensions, RLE sizes and uncompressed counts are integers. Box coordinates and areas can be fractional.",
        "bbox": "One [x, y, width, height] tuple per annotation, in pixels; x,y identify the top-left corner.",
        "segmentation": "Polygon lists contain flattened alternating x,y coordinates. RLE size is [height, width]; counts is a compressed string or an array of uncompressed integer run lengths.",
        "dates": "Date fields remain strings: COCO producers do not uniformly emit the strict UTC-millisecond ISO profile used by this registry.",
        "sources": [
            {
                "url": "https://github.com/cocodataset/cocoapi/blob/master/PythonAPI/pycocotools/mask.py"
            }
        ],
        "metadata": "Dataset info/licenses and image license/URL/date metadata may be absent. The retained Flatbug 1.2.0 COCO probe contains an empty year and date_captured=0; these placeholders are preserved, not invented timestamps.",
        "adapters": {
            "import_collection": "iai_model_zoo.formats.adapters.coco:import_collection",
            "export_collection": "iai_model_zoo.formats.adapters.coco:export_collection"
        }
    }
}