netcdf example_1plus  {  // CDL with CF addions     
     dimensions:         // dimension names and lengths are declared first
             lat = 5, lon = 10, level = 4, time = unlimited;
   
     variables:          // variable types, names, shapes, attributes
             short   time(time);
                         time:standard_name  = "time";
                         time:units      = "hours since 1996-1-1";
             int     lat(lat), lon(lon), level(level);
                         lat:units       = "degrees_north";
                         lat:standard_name = "latitude";
                         lon:units       = "degrees_east";
                         lon:long_name = "longitude";
                         level:standard_name     = "air_pressure";
                         level:units     = "millibars";
             float   temp(time,level,lat,lon);
                         temp:long_name     = "temperature";
                         temp:standard_name     = "air_temperature";
                         temp:units         = "celsius";
             float   rh(time,lat,lon);
                         rh:long_name = "relative humidity";
                         rh:valid_range = 0.0, 1.0;      // min and max

             // global attributes
                         :source = "Fictional Model Output";
                         :Conventions = "CF-1.0";
     
     data:                // optional data assignments
             level   = 1000, 850, 700, 500;
             lat     = 20, 30, 40, 50, 60;
             lon     = -160,-140,-118,-96,-84,-52,-45,-35,-25,-15;
             time    = 12;
             rh      =.5,.2,.4,.2,.3,.2,.4,.5,.6,.7,
                      .1,.3,.1,.1,.1,.1,.5,.7,.8,.8,
                      .1,.2,.2,.2,.2,.5,.7,.8,.9,.9,
                      .1,.2,.3,.3,.3,.3,.7,.8,.9,.9,
                       0,.1,.2,.4,.4,.4,.4,.7,.9,.9;
     }