Package-centric (the default). The exploring hierarchy is organized by package hierarchy. The top level shows the model. Under this are all the top level packages in the model and all the model elements that are directly in the namespace of the model.

Beneath each package are all the model elements that sit within the namespace of that package, including any further sub-packages (which in turn have their own sub-hierarchies).

Class-centric. Shows classes in their package hierarchy as well as datatypes and use case diagram elements. Similar to the Package-centric view but it doesn't show connecting or associating elements.

Diagram-centric. In this view the top level comprises all the diagrams in the model. Beneath each diagram is a flat listing of all the model elements on the diagram. Model elements that have sub-model elements that do not appear on the diagram have their own hierarchy (for example attributes and operations of classes).

Inheritance-centric. In this view the top level shows the model. Beneath this are all model elements that have no generalization in the model. Those model elements that have specializations have a sub-hierarchy showing the specializations.

Class Associations. In this view the top level shows the model. Beneath this are all diagrams and all classes. All classes that have associations have a hierarchy tracking through the associated classes.

Residence-centric. In this view the model is shown at the top-level, with below it only Nodes, and below these only components that reside on the nodes, and below these components all elements that reside on the components.

State-centric. In this view the top level shows all the state machines and all activity graphics associated with classes.

Beneath each state machine is a hierarchy showing the statechart diagram and all of the states. Beneath each state is a list of the transitions in and out of the state.

Beneath each activity graph is a hierarchy showing the activity diagram and all of the action states. Beneath each action state is a list of the transitions in and out of the action state.

Transitions-centric. This is very similar to State-centric view, but under each state machine is listed the diagrams and all transitions on the diagram, with states being shown as sub-hierarchies under their connected transitions.

Similarly under each activity graph is listed the diagrams and all transitions on the diagram, with action states being shown as sub-hierarchies under their connected transitions.

Composite-centric. In this view, all modelelements are shown according their composition in the UML metamodel.

This perspective shows far more modelelements then all others - it does not hide anything. Hence, this view is not so user-friendly, but very suited for the UML specialist.