syntax = "proto3"; option java_multiple_files = true; option java_package = "kr.heek"; package kr.heek; message Date { int32 year = 1; int32 month = 2; int32 day = 3; } message Time { int32 hour = 1; int32 minutes = 2; int32 seconds = 3; } message DateTime { Date date = 1; optional Time time = 2; } message LatLng { double latitude = 1; double longitude = 2; }