Dataset {
    Float32 X[X = 4];
    Float32 L[L = 1];
    Float32 percentile[percentile = 1];
    Grid {
     ARRAY:
        Float64 partial_X[L = 1][percentile = 1][X = 4];
     MAPS:
        Float32 L[L = 1];
        Float32 percentile[percentile = 1];
        Float32 X[X = 4];
    } partial_X;
} partial_X;