netcdf test_enum {
types:
  byte enum cloud_class_t {Clear = 0, Cumulonimbus = 1, Stratus = 2, 
      Stratocumulus = 3, Cumulus = 4, Altostratus = 5, Nimbostratus = 6, 
      Altocumulus = 7, Cirrostratus = 8, Cirrocumulus = 9, Cirrus = 10, 
      Missing = 127} ;
variables:
  cloud_class_t primary_cloud;
    cloud_class_t primary_cloud:_FillValue = Missing ;
data:
  primary_cloud = Stratus;
}