Modifying topic classes and instances
(→Additional notes) |
|||
| Line 1: | Line 1: | ||
| − | Each topic may | + | Each topic may be related to zero or more class topics. Class-instance relation is used to express ''a type'' or ''a kind'' of a topic. Next image views traditional topic panel with a '''Schema type''' topic. Red circles mark topic's classes and instances. |
| + | |||
| + | |||
| + | [[File:traditional_topic_panel_class_instances.gif|center]] | ||
| + | |||
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. | 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. | ||
Revision as of 16:49, 25 February 2013
Each topic may be related to zero or more class topics. Class-instance relation is used to express a type or a kind of a topic. Next image views traditional topic panel with a Schema type topic. Red circles mark topic's classes and instances.
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. This means that Wandora user can not use the relation class-instance nor role types class and instance in part of other relations. Wandora user can't set up 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 concept of a class in Wandora.
