A business rule is a named container for program code that performs a discrete task in a business process. The rule identifies and documents the code segment that performs this task. A business rule named Calculate Date Difference, for example, might consist of this segment:
COMPUTE WS-DATE-VARIANCE = WS-C-CARD-DATE-CCYYMM - WS-TODAYS-DATE-CCYYMM.
A business rule can contain one segment only. The same segment can be assigned to different rules. Rules are identified in the Rules pane with a symbol.