{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "definitions": {
        "split_node": {
            "type": "object",
            "properties": {
                "nodeid": {
                    "type": "number",
                    "minimum": 0
                },
                "depth": {
                    "type": "number",
                    "minimum": 0
                },
                "yes": {
                    "type": "number",
                    "minimum": 0
                },
                "no": {
                    "type": "number",
                    "minimum": 0
                },
                "split": {
                    "type": "string"
                },
                "children": {
                    "type": "array",
                    "items": {
                        "oneOf": [
                            {"$ref": "#/definitions/split_node"},
                            {"$ref": "#/definitions/leaf_node"}
                        ]
                    },
                    "maxItems": 2
                }
            },
            "required": ["nodeid", "depth", "yes", "no", "split", "children"]
        },
        "leaf_node": {
            "type": "object",
            "properties": {
                "nodeid": {
                    "type": "number",
                    "minimum": 0
                },
                "leaf": {
                    "type": "number"
                }
            },
            "required": ["nodeid", "leaf"]
        }
    },
    "type": "object",
    "$ref": "#/definitions/split_node"
}