PrF UG classes class window

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The Class Hierarchy Window

Protege-Frames User's Guide
Classes Tab
Class Browser
Class Buttons
Class Hierarchy Window
Class Icons
Class Menu
Class Search Bar
Superclasses Pane
Class Editor
Template Slots Pane
Template Slot Buttons
References Window
Creating a New Class
Creating Multiple Subclasses
Deleting a Class
Displaying the Class Editor
Editing a Class
Editing Template Slots
Finding a Class
Hiding a Class
Replacing a Superclass
Adding a Superclass
Jumping to A Superclass
Removing a Superclass
Viewing Class Relations
Classes & Instances Tab
Viewing References
Glossary, Editing Help

The Class Hierarchy window in the Class Browser displays the classes for the project and allows you to rearrange your hierarchy using "drag-and-drop". By default, the Class window displays the class structure of your knowledge base, with all classes shown as descending, directly or indirectly, from the system class :THING.

Class Hierarchy window


This window shows the following:

  • Subclasses appear below their superclasses and are indented to the right.

  • Hierarchy icons indicate how much or how little of the hierarchy is displayed:

    • An "expanded" icon (all_hierarchy.expanded) means that all direct subclasses of the class are displayed.

    • A "collapsed" icon (all_hierarchy.collapsed) means that the class has direct subclasses which are not currently displayed. You can click on this icon to toggle it.

    • If no icon is displayed, the class has no direct subclasses.

    Tip: You can also display all classes below a class by right-clicking the class and selecting Expand from the cascading Class Menu.

  • The currently selected class is shown with a highlight.

  • Classes with more than one superclass appear more than once in the tree.

  • Class icons show information about your class (e.g., the class role).

Note: You can also change the view from the default to view the class relations for a selected class. Most of the time, however, you will work with the default hierarchy view.


The Class Hierarchy window allows you to perform the following tasks:

  • You can select a class by clicking on it.

  • You can edit the attributes of a class in the Class Editor. When a class is selected, the Class Editor appears to the right. You can also open the Class Editor for one or more selected classes by clicking the View Class (classes_class.view) button.

  • You can create a new class by clicking the Create Class (classes_class.create) button and creating and editing its attributes in the Class Editor.

  • You can delete a class by clicking the Delete Class (classes_class.delete) button.

  • You can search for a class by typing all or part of the class name in the Class lookup bar and then clicking the Find Class ( button.

  • You can work with metaclasses and hidden classes, using the right mouse button. See the Class menu for more information.

You can also rearrange the superclass/subclass relationships:

For additional superclass tasks that you can perform, see the Superclasses pane.