The general DESL syntax form(s) for a type-3 option argument list :

 
     option_name  +  (on the same or one or more lines immediately
                      following)  :
 
     1. val-1   val-2   val-3 ... val-N ...
 
     2. val-i   to  val-j  ...
 
     3. val-i   to  val-j  by  by_val ...
 
     4. val-1   val-2   val-i   to    val-j  ...
 

where, val-1, etc is an integer or real value. All values in the DESL system are interpreted as real numbers.

The to and by conjunctions act to imply a sequence of values. If the by specification is not included in association with a corresponding to the by_val is assumed to be 1.0.

The to specification acts to increment (or decrement, if the by_val is negative) the value to its left by the specified or default bye_val until the value on the right of the to is equaled or would have been exceeded - i.e., no implied value will be beyond the limit imposed by the value on the right of the to.

 



      1.  1 2 3 4 10 to 25

      implies :

          1, 2, 3, 4, 10, 11, 12, ... 24, 25
 



      2.  -.5 to .5 by .25

      implies :

          -.5, -.25, 0., .25, .5
 
 
 
 
 
 

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As in the case with all options, the option context determines the meaning of the specified or implied values.

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