| 
 | 
Just to add my 2 pennies worth, I prefer the DOW construct.
One advantage is that it effectively has a 'first cycle processing'
section which can easily be inserted:
     Key         ChainFile                  80
      *in80       Ifeq *off
     { first clycle processing in here }
                  Endif
     *in80       DowEq*Off
      { main processing here }
      Key         Reade File                      80
                  Enddo
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