Summary of Representing Objects and Relationships

You represent these object-oriented principles...	By using these techniques in G2...	Described in this section...
Classes and instances	Class definitions and instances	Representing Classes and Instances
Subclasses, class hierarchy, and inheritance	Direct superior classes and multiple inheritance	Representing Subclasses and Class Hierarchies
Subsystems, compound objects, and object hierarchies	Subobjects, subworkspaces, and workspace hierarchies	Representing Compound Objects and Workspace Hierarchies
Connections and relations	Connection definitions, stubs, and relation definitions	Representing Physical and Conceptual Relationships
Encapsulation and information hiding	Layered module architecture, public and private naming conventions, item configurations, user modes, application programmer's interface (API), and graphical user interfaces (GUI)	Designing Reusable Modules Encapsulating Your Module Constructing an API Chapter 9, Building a User Interface