dataset {
    Sequence {
	String name;
	Int32 age;
    } person;
    Structure {
	Int32 j;
	Int32 i;
	Structure {
	    int32 i;
	    float64 f[10];
	} data;
    } exp;
    Grid {
      Array:
	float64 g[10][10][10];
      Maps:
	float64 lat[10];
	float64 lon[10];
	float64 weirdness[10];
    } strange;
} data6;