17.4. Descriptor Setup Operator

  <set descriptor statement> :: =
    SET DESCRIPTOR <descriptor name>
   <set descriptor information>
 <set descriptor information> :: =
   <set count>
  (VALUE <item number> <set item information>
      [{<comma> <set item information>} ...]
 <set count> :: = COUNT <equals operator> <simple value specification 1>
 <set item information> :: =
   <descriptor item name>
   <equals operator>
   <simple value specification 2>
 <simple target specification 1> :: = <simple target specification>
 <simple target specification 2> :: = <simple target specification>
 <item number> :: = <simple value specification> 

Comment:

The SET DESCRIPTOR statement is used to fill descriptor elements for use in the USING clause. During one execution of the operator, you can place the value in the COUNT field (the number of filled elements), or partially or completely form one element of the descriptor.