netcdf compound_example {
types:
  compound wind_vector_t {
    float eastward ;
    float northward ;
  }; // wind_vector_t
dimensions:
	lat = 9 ;
	lon = 18 ;
	pres = 5 ;
	time = UNLIMITED ;
variables:
	wind_vector_t wind(time, pres, lat, lon) ;
		wind:standard_name = "geostrophic_wind_vector" ;
data:
	wind = {-10, 3.5}, {2.5, 0}, ...
}