The predefined object identifiers are:
| Predefined Object Identifier | Usage |
|---|---|
| SELF | References the object on which the current method is executing. May be used in the Procedure Division of a method. References the object that was used to invoke the method in which SELF appears. If SELF is specified for a method invocation, the search for the method includes all methods declared for the object. |
| SELFCLASS | References the object that is the class object of the current object (SELF). If SELF is itself a class object, SELFCLASS is the system class BEHAVIOR. The class object BEHAVIOR terminates this self-reference. (i.e., If SELF is the BEHAVIOR of class, so is SELFCLASS.) |
| SUPER | References the object on which the current method is executing. May be used in the Procedure Division of a method. May be the object used to invoke a method with the INVOKE statement or inline invocation. References the object that was used to invoke the method in which SELF appears. If SUPER is specified for a method invocation, the search for the method ignores all the methods defined in the same class as the executing method. |
| NULL | References the null object reference value, which is a unique value that is guaranteed to never reference an object. NULL is implicitly described as class object and category object reference, and is not a universal object reference. NULL must not be specified as a receiving operand. |