enum Formats {
    DEC = 1;
    HEX = 0x1F;
    OCT = 017;
}

message Msg {
    required int32 dec = 1 [default=-1];
    required int32 hex = 2 [default=-0x1F];
    required int32 oct = 3 [default=-017];
    required double exp = 4 [default=0.1e5];
    required double nod = 5 [default=1.];
    required double exn = 6 [default=1e8];
    required double sp1 = 7 [default=inf];
    required double sp2 = 8 [default=-inf];
    required double sp3 = 9 [default=nan];
    required int32 hexUC = 10 [default=0X209];
}