{
    "type": "record",
    "name": "DeviceAge",
    "separatorChar": "\t",
    "fields": [
        {
                "name": "device_id",
                "type": "string",
                "doc": "device id,google ad id for android,idfa for ios"
        },
        {
                "name": "device_type",
                "type": "string",
                "doc": "device type, gaid or imei or idfa or android id"
        },
        {
                "name": "package_names",
                "type": "string",
                "doc": "包名之间以逗号分隔"
        },
        {
                "name": "age",
                "type": "string",
                "doc": "年龄段与来源；各个年龄段和权重 json格式"
        },
        {
                "name": "tag",
                "type": "string",
                "doc": "calc,unknow or confirm"
        }
    ]
}