Dataset {
    Int32 P[P = 12];
    Float32 Y[Y = 73];
    Float32 X[X = 144];
    Grid {
     ARRAY:
        Float64 partial_X[P = 12][Y = 73][X = 144];
     MAPS:
        Int32 P[P = 12];
        Float32 Y[Y = 73];
        Float32 X[X = 144];
    } partial_X;
} partial_X;