Format 3

This format assigns an invalid address as the initial value of an item defined as USAGE POINTER, USAGE PROCEDURE-POINTER, or USAGE FUNCTION-POINTER. It also assigns an invalid object reference as the initial value of an item defined as USAGE OBJECT REFERENCE.

Format 3: NULL value

Read syntax diagramSkip visual syntax diagramVALUEISNULLNULLS

VALUE IS NULL can be specified only for elementary items described implicitly or explicitly as USAGE POINTER, USAGE PROCEDURE-POINTER, USAGE FUNCTION-POINTER, or USAGE OBJECT REFERENCE.