The complete DDS:

Dataset {

    Int32 i[20];

    Int32 j;

    String s;

    Grid {

      Array:

        Float64 val[length = 5][width = 6][height = 7];

      Maps:

        Float64 length[5];

        Float64 width[6];

        Float64 height[7];

    } g;

} test1;

The data:

Grid {

  Array:

    Float64 val[length = 3][width = 3][height = 3];

  Maps:

    Float64 length[3];

    Float64 width[3];

    Float64 height[3];

} g = {  Array: {{{99.999, 99.999, 99.999},{99.999, 99.999, 99.999},{99.999, 99.999, 99.999}},{{99.999, 99.999, 99.999},{99.999, 99.999, 99.999},{99.999, 99.999, 99.999}},{{99.999, 99.999, 99.999},{99.999, 99.999, 99.999},{99.999, 99.999, 99.999}}}  Maps: {99.999, 99.999, 99.999}, {99.999, 99.999, 99.999}, {99.999, 99.999, 99.999} };