Once JOE is up, it would appear as in figure below:
| Component | Description |
| Node names window
(the left most panel) |
Displays all available nodes in a given ontology grouped by entities,
attributes, and relations.
The user can locate any node in the ontology by double clicking on the node and JOE will automatically scroll the window to bring that node to the center of the current view. The user can also type the name of the node directly if the name is already known using the Find button. (can be shown or hidden) |
| SQL window
(the top most panel) |
This window displays the current uptodate SQL query when JOE is executing
in the query mode. From this window the user can perform many query related
operations (i.e. submitting a query, loading, etc.)
(can be shown or hidden) |
| Graphical query tree window
(the right most panel) |
This window displays the current status of the query in JOE's unique
graphical tree format.
(can be shown or hidden) |
| Constraint Input window
(the bottom panel) |
This window allows the user to set constraints on selected attribute.
(can be shown or hidden) |
| Work area window
(the center panel) |
This is the most active area of JOE where the ontology is displayed
(always visible) |
The figure below shows JOE with all five panels
| Method-1 | Method-2 |
| In the presence of InfoSleuth (i.e. the applet tag for "used_with_is" is set to "yes"), select the "File\Ontology\Open" menu. At this time JOE will communicate with InfoSleuth's UserAgent and requests for all available ontologies and then display them in a list for selection. Once the selection is made, JOE will obtain the ontology and then display it in its main working area. | In the absence of InfoSleuth (i.e. the applet tag for "used_with_is" is set to "no") , "Shift key+mouse click" combination on JOE's main canvas will popup a small child window where a number can be entered. The number entered in in this window will generate that many dummy entities and assign an arbitrary number of attributes to each of those entities. Then JOE will generate an ontology based on these entities and attributes and display it on the canvas. Entities are named as entity[i] and attributes are named attribute[j]. This second method is useful for testing or debugging purpose. |
The figure below shows JOE with a dummy ontology created by the second method
note: In JOE, ontologies are represented using Entity-Relationship (ER) model as shown below in the diagram.
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