{
    "additionalProperties": false,
    "definitions": {
        "guid": {
            "pattern": "^[a-f][a-f0-9]{31}$",
            "type": "string"
        },
        "shape": {
            "additionalProperties": false,
            "properties": {
                "attr": {
                    "additionalProperties": {
                        "oneOf": [
                            {
                                "type": "string"
                            },
                            {
                                "type": "number"
                            }
                        ]
                    },
                    "maxProperties": 100,
                    "type": "object"
                },
                "bbox": {
                    "properties": {
                        "height": {
                            "type": "number"
                        },
                        "width": {
                            "type": "number"
                        },
                        "x": {
                            "type": "number"
                        },
                        "y": {
                            "type": "number"
                        }
                    },
                    "type": "object"
                },
                "children": {
                    "items": {
                        "$ref": "#/definitions/shape"
                    },
                    "type": "array"
                },
                "name": {
                    "enum": [
                        "text",
                        "tspan",
                        "polygon",
                        "polyline",
                        "line",
                        "rect",
                        "ellipse",
                        "circle",
                        "path"
                    ],
                    "type": "string"
                },
                "text": {
                    "maxLength": 1000,
                    "type": "string"
                }
            },
            "required": [
                "name",
                "attr"
            ],
            "type": "object"
        }
    },
    "properties": {
        "from": {
            "$ref": "#/definitions/shape"
        },
        "id": {
            "$ref": "#/definitions/guid"
        },
        "to": {
            "$ref": "#/definitions/shape"
        },
        "type": {
            "enum": [
                "addition",
                "removal",
                "replacement",
                "mutation"
            ],
            "type": "string"
        },
        "undoOf": {
            "$ref": "#/definitions/guid"
        }
    },
    "required": [
        "id",
        "type"
    ],
    "type": "object"
}