In Constructors -- Level One, the DDATA class implicitly extended OBJECT.CLASS. In fact, any class without an explicit EXTENDS clause in the CLASS statement extends OBJECT.CLASS. To explicitly extend ...

In this case, DDATA was implicitly extended from OBJECT.CLASS. Since OBJECT.CLASS contains a _term method, you must indicate that you are overriding it in DDATA by specifying State='O'. Because OBJECT ...