The complete DDS:
Dataset {
    Structure {
        Int32 j;
        Int32 k;
    } s1;
    Structure {
        Int32 l;
        Int32 m;
    } s2[10];
    Structure {
        Int32 n;
        Int32 o;
    } s3;
} test2;
The data:
Structure {
    Int32 m;
} s2[2] = {{ 123456789 }, { 123456789 }};