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A full description of OWLViz is available in the OWLViz manual.ĭL Query - requires the ontology to have been classified before it will return results. This tab shows a graphical representation of the class subsumption hierarchy. OWLViz - requires installation of GraphViz before anything will be visible.
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These reasoners are available for download from the File > Check for plugins… menu item.
There are other reasoners available for Protege, including Pellet and FaCT++. Notice the difference between this inferred hierarchy (the hierarchy computed by the reasoner) and the asserted hierarchy (the hierarchy written down in the ontology). You can also switch to the inferred class hierarchy using the drop down box in the top right of the class hierarchy.
In other words, it is information that has been computed by the reasoner. Notice that some of the information on the right hand side is displayed with a yellow background - this is inferred information. For example, select American in the class hierarchy (under NamedPizza, which is under Pizza, which is under Food, which is under DomainConcept). After the reasoner finishes you can inspect your ontology to view inferred information. To reason over your ontology, open the Reasoner menu and select HermiT. Reasoning over your ontology is a commonly performed activity and Protege comes (to activate a view search dialog, click anywhere in the required view to give it focus, then press CTRL+F (or CMD+F on a Mac). In addition, the various hierarchy views have their own search dialogs The Search… button in the toolbar performs a global search in the loaded ontologies. The right hand side displays information about the selected entity (in this case Country).Īnother easy way to navigate around the contents of an ontology is to perform a search. Here, the class Country is selected in the Class Hierarchy (Tree) on the left hand side. Opening up the hierarchies and selecting a class or property displays the appropriate description on the right.īackward and forward navigation is possible with the left and right arrow buttons in the toolbar, So that links can be followed easily regardless of which view you are using. In addition, most views implement hypertext navigation The right pane changes to display the selection immediately. When a class, property or individual is selected in the trees on the left-hand side, Which can be resized, removed, floated, split, and layered (more about views later). The Entities tab is the workhorse of the ontology editor.įrom this location, you can explore all of the classes, properties, and individuals in an ontology.Īs you may have already noticed, each tab This search window can also be opened by pressing CTRL+F (or CMD+F on a Mac). The top right of the toolbar is home to the Search… button, which can be pressed to open the search window. When working on a single ontology this concept of the active ontology is not a concern. The drop-down box on the toolbar displays the current active ontology, that is to say, the one into which all edits take place. This tab shows an overview of the “active” ontology, including metrics on its contents, annotations on the ontology, and imported ontologies. You will now be presented with the main Protege workspace, which displays the Active Ontology tab by default. In the next dialog, enter in the URI field and press OK. A dialog will be displayed asking you whether you want to open the ontology in the current window. From the File menu choose Open from URL….
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Please follow the step-by-step instructions to install Protege.
If you haven’t already done so, you need to download and install Protege Desktop from the Protege website. In just a few minutes you should be able to install Protege, load an ontology, navigate around it, use a reasoner to classify it and configure the interface to your taste. This getting started guide forms part of the Protege Desktop user documentation and is designed to get you up and running with the tool. Protege is an OWL ontology development environment.
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