Modifying topic classes and instances
Each topic may contain zero or more class topics. Class topic sets up a class-instance relation between the class topic and it's carrier, called here as the instance topic.
Class is added to a topic by right-clicking the title header Classes and selecting Add class. Operation employs pick-a-topic-type window used to point the topic class. Topic's class is deleted selecting a row in the class table, right-clicking the row and selecting Delete classes.... Multiple classes can be removed at once.
Also Topics > Add to topic > Add class menu selection adds topic a class and Topics > Delete from topic > Delete classes deletes the class but leaves the class topic intact.
Modifying topic instances
Instance is added to a topic by right clicking the title header of Instances table and selecting Add instance.... Instance is deleted by selecting row in the instance table, right-clicking selected row and selecting Delete instances....
Also menu selections Topics > Add to topic > Add instance and Topics >Delete from topic > Delete instances can be used to add and delete instances.
Additional notes
Wandora models class-instance relations using internal data structures. Wandora doesn't contain a topic that represents the relation type or role types class and instance. This means that Wandora user can not use the relation class-instance nor the role types in other relations, associations, for example, as players. Wandora user can't set a superclass of a class-instance, for example.
Wandora speaks of classes and instances while the Topic map standard speaks of types and instances. Reader should understand that a type described in Topic map standard is equivalent to a class of Wandora.
