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The latest version of OWLGrEd is 1.6.1. It is free for any use.

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Version 1.6.1

Install

After downloading OWLGrEd, extract (unzip) the archive. You will have to run OWLGrEd with administrator privileges because it needs to register an OCX component. To do that, navigate into the unzipped folder, right click on owlgred.exe and select "Run as Administrator" from the context menu. You should see a message that the OCX registration has succeeded.

Run as Administrator

Run as Administrator

Right click on owlgred.exe and select "Run as Administrator".

Visualize

You can visualize an existing ontology by selecting "Visualize Ontology" from the splash window when opening OWLGrEd for the first time. Additional ontologies can be visualized from the project diagram's context menu item "Load Ontology".

Visualize from the Splash Window

From Splash Window

Click on "Visualize Ontology" and select an .owl file you want to visualize.

Visualize from the project diagram's context menu

From Context Menu

Right click on the Project Diagram canvas and select "Load Ontology" from the context menu.

Edit

To create a new ontology, select "OWL" tool from the Project Diagram's palette, then click on the diagram canvas where you want to place the ontology node. Afterwards a new window will open where you can edit the ontology name and other meta data. After closing the window you can open the created ontology with a double click on the ontology node.

Create an Ontology from the Project Diagram's Palette

Create Ontology

Select the "OWL" tool from the Project Diagram's Palette and click on the canvas. Afterwards double click on the created node, to open the ontology.

Export

To save an ontology to an .owl file, right click on the ontology canvas and select "Save Ontology" from the context menu.

Export an Ontology to an .owl file

Export to an .owl file

Right click on the ontology canvas and select "Save Ontology" from the context menu.

Share

You can share your ontology with others on the web by exporting it to the SVG format and by placing it in your HTML file. Right click on the ontology canvas and select "Save Ontology" from the context menu. Alternatively you can export to a picture file by selecting "Diagram → Save As Picture → Diagram..." from the menu bar.

Export an Ontology to an .svg file

Export to SVG

Right click on the ontology canvas and select "Export To SVG" from the context menu.

Export an Ontology to a picture

Export to Picture

Select "Diagram → Save As Picture → Diagram..." from the menu-bar, and select picture format in the dialog.

Customize

Ontology layout mode can be changed through "Diagram → Automatic Alignment" in OWLGrEd toolbar.

The way elements are displayed can be changed in the style dialog. To open the style dialog, right-click on an element you want to modify and select Change Type Style. Some of the things you can change in the style dialog are: node shape and background color, line color and routing, compartment (text field) visibility and font.

Layout Algorithm Selection

Change Layout

The layout algorithm can be changed from the menu bar. Select "Diagram → Automatic Alignment → ...".

Change Element Type Style

Change Element Type Style

Right click on the element you want to change. Select "Change Type Style" from the context menu.

Protégé Plugin (Legacy)

OWLGrEd can interoperate with Protégé (up to the 5.0.0 beta 17). To enable this feature, you need to download the Protégé plugin lv.lumii.tda.jar (Version 2.0) and place it into the Protégé plugin folder (e.g., "C:\Program Files\Protege\plugins\").

Install OWLGrEd Protege Plugin

Install Plugin

Place the downloaded OWLGrEd Protégé plugin into the Protégé plugins folder and restart Protégé

To visualize an existing ontology from Protégé, first enable Protégé import in OWLGrEd. This is done by clicking the toolbar icon "Enable Import from Protege" in the project diagram. Then on the Protégé side you can select "Tools → Export to TDA" from the task bar. You can change which kinds of axioms to visualize through "File → Preferences" in the "TDA Preferences" tab in Protégé.

Enable Import from Protégé

Enable Import from Protege

Click the "Enable Import from Pretege" in the Project Diagram.

Export to OWLGrEd from Protégé

Send to OWLGrEd

In the Protégé menu bar select "Tools → Export to TDA".

To send an ontology from OWLGrEd to Protégé, right-click on the ontology canvas and select "Send To Protege" from the context menu (Protégé must be already open).

Export to Protégé from OWLGrEd

Send to Protégé

Right click on the ontology canvas and select "Send To Protege" from the context menu.