Class Definition (OO Native COBOL) A Class describes an Object COBOL Class object and its instance objects. It contains nested programs for class methods and
instance methods.
Class Extension (OO Native COBOL) A class extension enables you to add extra functionality to an object COBOL class without changing the original source code.
Method Interface Definition (OO Native COBOL) A method interface definition defines the parameters for the method, how they are passed, and any alternate syntax that can
be used to invoke the method.