{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "definitions": {
        "numberWithUnit": {
            "properties": {
                "unit": {
                    "type": "string"
                },
                "value": {
                    "type": "number"
                }
            },
            "required": [
                "value",
                "unit"
            ],
            "type": "object"
        }
    },
    "properties": {
        "car": {
            "type": "string"
        },
        "comment": {
            "type": "string"
        },
        "cost": {
            "$ref": "#/definitions/numberWithUnit"
        },
        "fuelType": {
            "type": "string"
        },
        "mileage": {
            "$ref": "#/definitions/numberWithUnit"
        },
        "missedFuelStop": {
            "type": "boolean"
        },
        "time": {
            "_format": "date-time",
            "type": "string"
        },
        "volume": {
            "$ref": "#/definitions/numberWithUnit"
        }
    },
    "required": [
        "fuelType",
        "car",
        "cost",
        "mileage",
        "volume",
        "time"
    ],
    "type": "object"
}