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} };