proc format lib = ia cntlout = fmtdata;
   select $airport;
run;

/* proc fsedit data=work.fmtdata;
run; */

/* data work.fmtdata;
   set work.fmtdata end=last;
   output;
   if last then do;
         FmtName = '$airport';
         Start = 'YYC';
         End = 'YYC';
         Label = 'Calgary, AB';
      output;    
         Start = 'YYZ';
         End = 'YYZ';
         Label = 'Toronto, ON';
      output;
         Start = 'YQB';
         End = 'YQB';
         Label = 'Quebec, QC';
	 output;
         Start = 'YUL';
         End = 'YUL';
         Label = 'Montreal, QC';
      output;
   end;
run;  */


proc sql;
   insert into fmtdata
      set FmtName = '$airport',
            Start = 'YYC',
             End = 'YYC', 
            Label = 'Calgary, AB'
	  set FmtName = '$airport',
            Start = 'YYZ',
              End = 'YYZ' ,
            Label = 'Toronto, ON'
 	  set FmtName = '$airport',
            Start = 'YQB',
              End = 'YQB',
            Label = 'Quebec, QC'
      set FmtName = '$airport',
            Start = 'YUL',
              End = 'YUL' ,
            Label = 'Montreal, QC';
 quit;

proc format library = ia cntlin = fmtdata;
run;

proc format library = ia fmtlib;
   select $airport;
   title 'New values in the $airport Format';
run;