{
    "$id": "https://scratch.mit.edu/sb2_definitions.json",
    "$schema": "http://json-schema.org/schema#",
    "description": "Scratch 2.0 Project and Sprite Definitions",
    "definitions": {
        "scripts": {
            "type": "array"
        },
        "sounds": {
            "type": "array",
            "properties": {
                "soundName": {
                    "type": "string"
                },
                "soundID": {
                    "type": "number"
                },
                "md5": {
                    "type": "string"
                },
                "sampleCount": {
                    "type": "number"
                },
                "rate": {
                    "type": "number"
                },
                "format": {
                    "type": "string"
                }
            },
            "required": [
                "soundName",
                "soundID",
                "md5",
                "sampleCount",
                "rate",
                "format"
            ]
        },
        "costumes": {
            "type": "array",
            "properties": {
                "costumeName": {
                    "type": "string"
                },
                "baseLayerID": {
                    "type": "number"
                },
                "baseLayerMD5": {
                    "type": "string"
                },
                "bitmapResolution": {
                    "type": "number"
                },
                "rotationCenterX": {
                    "type": "number"
                },
                "rotationCenterY": {
                    "type": "number"
                }
            },
            "required": [
                "costumeName",
                "baseLayerID",
                "baseLayerMD5",
                "bitmapResolution",
                "rotationCenterX",
                "rotationCenterY"
            ]
        },
        "variables": {
            "type": "array",
            "properties": {
                "name": {
                    "type": "string"
                },
                "value": {
                    "type": "string"
                },
                "isPersistent": {
                    "type": "boolean"
                }
            },
            "required": [
                "name",
                "value"
            ]
        },
        "sprite_object": {
            "type": "object",
            "properties": {
                "objName": {
                    "type": "string"
                },
                "variables": {"$ref": "#/definitions/variables"},
                "sounds": {"$ref":"#/definitions/sounds"},
                "costumes": {"$ref":"#/definitions/costumes"},
                "currentCostumeIndex": {
                    "type": "number",
                    "minimum": 0
                }
            },
            "additionalProperties": true,
            "required": [
                "objName",
                "costumes",
                "currentCostumeIndex"
            ]
        },
        "stage_child": {
            "type": "object",
            "description": "A child of the stage, can be a sprite or a monitor"
        },
        "stage_object" : {
            "type": "object",
            "properties": {
                "objName": {
                    "type": "string"
                },
                "variables": {"$ref": "#/definitions/variables"},
                "lists": {
                    "type": "array",
                    "properties": {
                        "listName": {
                            "type": "string"
                        },
                        "contents": {
                            "type": "array"
                        },
                        "isPersistent": {
                            "type": "boolean"
                        },
                        "x": {
                            "type": "number"
                        },
                        "y": {
                            "type": "number"
                        },
                        "width": {
                            "type": "number"
                        },
                        "height": {
                            "type": "number"
                        },
                        "visible": {
                            "type": "boolean"
                        }
                    },
                    "required": [
                        "listName",
                        "contents"
                    ]
                },
                "scripts": {"$ref": "#/definitions/scripts"},
                "sounds": {"$ref": "#/definitions/sounds"},
                "costumes": {"$ref": "#/definitions/costumes"},
                "currentCostumeIndex": {
                    "type": "number",
                    "minimum": 0
                },
                "penLayerMD5": {
                    "oneOf":[
                      {"type": "string"},
                      {"type": "null"}
                    ]
                },
                "penLayerID": {
                    "type": "number",
                    "minimum": -1
                },
                "tempoBPM": {
                    "type": "number"
                },
                "videoAlpha": {
                    "type": "number",
                    "minimum": 0,
                    "maximum": 1
                },
                "children": {
                    "type": "array",
                    "items": {"$ref": "#/definitions/stage_child"}
                }
            },
            "required": [
                "objName",
                "costumes",
                "currentCostumeIndex",
                "penLayerMD5",
                "tempoBPM",
                "children"
            ]
        }
    }
}