The tutorial [editor handling]

The information here was last updated on 9 November 1997

Building Ontologies

note:

Currently, ontology building is limited to inserting concepts (entities), properties (attributes), and relationships. It is done this way so that JOE will be able to function in the InfoSleuth environment and meet sertain standards set by InfoSleuth system.
Currently, JOE does not validate the ontology during the building process - validation is upto the user.
Few other features, with regard to ontology development, supported by JOE have been disabled in this version (these features will be enabled in the near future).
If the applet is used as a stand-alone program, then the users can save or load ontologies, to or from the client computers. This can also be achieved by setting appropriate security options in Sun's HotJava browser and then viewing JOE (as an applet) in it. With other browsers none of the IO functions can be used.

Inserting Nodes

Overview
Ontologies are represented by means of Entity-Relationship (ER) diagrams. ER diagram is a graph in which nodes
are either entities, attributes, or relationships, and the arcs between nodes represent relationships between
corresponding nodes in the graph.

JOE also uses ER diagrams to represent ontologies. JOE represent entities by blue rectangle, attributes by
green elipses, and relationships by either yellow diamond or pink hexagon.
note: JOE does not allow users to insert attributes alone; user must pick the parent entity first.

		or
Adding concepts (Entities/Frames)	Adding properties (Attributes/Slots)	Creating relationships

Adding a new concept (Frame/Entity) to the current ontology

Inserting a new entity is done by means of the dialog window shown below.
This window is invoked by the following three steps:

Make sure that JOE is executing in the editor mode.
Select the Frame/Insert New Frame[s] menu.
Click on the working area where you would like to place this entity
(If you don't like the placement, you can always move it later).

Click on the image to get more details.

Adding a new properties (Slots/Attributes) to the current ontology

Adding new attributes to an existing entity or editing old ones is done by means of the dialog window shown below

This window is invoked by the following three steps:

Make sure that JOE is executing in the editor mode.
Select the Frame/Edit Slots menu.
Click on the entity whose attributes you would like to edit.

Click on the image to get more details.

Creating new relations in the current ontology

Creating new relations is described here with samples

Deleting Nodes

To delete nodes follow the steps described below:
WARNING: This operation can be undone

Make sure that JOE is executing in the editor mode
Select Edit/Delete Node[s] menu
Click on the node that you would like to delete

Tutorial

Please send all bug reports and comments to:
Kuha at kuha@ieee.org

Free Counter