Package com.amberarcher.corba.idl;
Helpers
  all = [0 .. 0xFFFF];
  lowercase = ['a' .. 'z'];
  uppercase = ['A' .. 'Z'];
  digit = ['0' .. '9'];

  tab = 9;
  cr = 13;
  lf = 10;
  eol = cr lf | cr | lf;

Example 3: First line defines which package the generated code goes into.