The following example illustrates the possible types of occurrence of complex ODO.
01 FIELD-A.
02 COUNTER-1 PIC S99.
02 COUNTER-2 PIC S99.
02 TABLE-1.
03 RECORD-1 OCCURS 1 TO 5 TIMES
DEPENDING ON COUNTER-1 PIC X(3).
02 EMPLOYEE-NUMBER PIC X(5). (1)
02 TABLE-2 OCCURS 5 TIMES (2)(3)
INDEXED BY INDX. (4)
03 TABLE-ITEM PIC 99. (5)
03 RECORD-2 OCCURS 1 TO 3 TIMES
DEPENDING ON COUNTER-2.
04 DATA-NUM PIC S99.
Definition: In the example, COUNTER-1 is an ODO object, that is, it is the object of the DEPENDING ON clause of RECORD-1. RECORD-1 is said to be an ODO subject. Similarly, COUNTER-2 is the ODO object of the corresponding ODO subject, RECORD-2.
The types of complex ODO occurrences shown in the example above are as follows:
The length of the variable portion of each record is the product of its ODO object and the length of its ODO subject. For example, whenever a reference is made to one of the complex ODO items shown above, the actual length, if used, is computed as follows:
You must set every ODO object in a group item before you reference any complex ODO item in the group. For example, before you refer to EMPLOYEE-NUMBER in the code above, you must set COUNTER-1 and COUNTER-2 even though EMPLOYEE-NUMBER does not directly depend on either ODO object for its value.
Restriction: An ODO object cannot be variably located.