types in ArcObject OMD-
The following are the types of
classes shown on UML OMDs:
classes cannot be used to create objects (they are a specification for
subclasses through type inheritance). For example, a "line"
can be an abstract class for "primary line" and "secondary
line" classes. Abstract classes are important for developers who want to
create their own subclass (they show which interfaces are required and which
are optional for the type of class they are implementing). Required interfaces
must be implemented on any subclass of the abstract class to ensure the new
class behaves correctly in the ArcObjects system.
· Coclasses—Coclasses represent objects that
you can directly create using the object declaration syntax in your development
environment. *Classes—Classes cannot directly
create objects, but objects of a class can be created as a property of another class or instantiated by objects from another class.