<procedure reference identifier>

An identifier associated with a procedure reference in a PROCEDURE REFERENCE declaration.

The PROCEDURE REFERENCE declaration does not initialize the procedure reference during declaration. The procedure reference must be assigned to a value before it can be invoked. A run time error occurs if the procedure reference identifier is invoked before it is initialized.

A PROCEDURE REFERENCE declaration cannot appear in the formal parameter part of a PROCEDURE declaration, PROCEDURE REFERENCE ARRAY declaration, or of another PROCEDURE REFERENCE declaration. A procedure reference can be passed as an actual parameter to a formal procedure that is of the same type and that has the same parameter descriptions.