{ "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" } ] }