USER-DEFINED HIERARCHIES OF USER-DEFINED CLASSES OF GRAPHICAL OBJECTS IN A GRAPHICAL MODELING ENVIRONMENT

摘要

The present invention allows a user to graphically define a hierarchy of user-defined, executable classes of graphical objects that can be implemented in a graphical model. The present invention supports the features of inheritance, abstraction and polymorphism. Further, descendant classes of graphical objects can graphically extend the behavior and/or structure of ancestor classes of graphical objects.