What does it do? The statement INTERFACE defines interfaces in ABAP Objects or defers their declaration.
The definition of an interface consists of a declaration section that starts with INTERFACE and is closed using ENDINTERFACE. Unlike classes, an interface does not have an implementation part.
The variant of INTERFACE without ENDINTERFACE is used for deferring interfaces in a program. The statements INTERFACE and associated statements ENDINTERFACE can only be specified in the global context of a program. INTERFACE and ENDINTERFACE cannot be specified within classes, procedures, BEGIN_SECTION VERSION 5 OUT and processing blocks implemented internally as a procedure, that is, event blocks for GET and AT SELECTION-SCREEN) END_SECTION VERSION 5 OUT . This applies in particular to the variant of INTERFACE specified here, which is not closed using ENDINTERFACE.
