Classes

Classes Window

By using the classes box context menu (the white circle), you can

• Create a new Class
• Show / Hide empty, hidden or system classes

By using the context menu of a class:

• List Instances
• Create a new instance
• View class description
• Edit class descripion
• Delete class description

Onto Wiki Class Types

Onto Wiki distinguish between these types of classes.

Hidden Class

You can hide a class by setting the attribute SysOnt:hidden to true. By default, hidden classes are not displayed in the Classes Window. You can choose “Show Hidden Classes” in the window context menu to show all hidden classes.

System Class

A system class is defined as a class from the RDF, RDF Schema and OWL namespace. By default, system classes are not displayed in the Classes Window. You can choose “Show System Classes” in the window context menu to show all system classes.

Empty Class

An empty class has no instances. This means there is no statement ?resource rdf:type ?Empty Class but a class description of that class. By default, empty classes are not displayed in the Classes Window. You can choose “Show Empty Classes” in the window context menu to show all empty classes.

Implicit Class

An implicit class has at least one instance but there is no class description defined in the model. This means, you should select “Edit Class Description” from that class context menu and add at least a label for that class.