Dataset {
    Float32 Y[Y = 40];
    Float32 S[S = 17];
    Float32 X[X = 56];
    Grid {
     ARRAY:
        Float32 PredErrorVars[S = 17][Y = 40][X = 56];
     MAPS:
        Float32 S[S = 17];
        Float32 Y[Y = 40];
        Float32 X[X = 56];
    } PredErrorVars;
} Forecast;