The Ontology navigation paradigm shows the ontology used in the showcase. This kind of conceptual modeling represents an abstract, simplified, and structured view of a specific area of knowledge – in this case the news domain. It consists of a set of concepts assumed to exist in it and the relationships between them. As seen in the overview, you can use the Ontology paradigm for thorough exploration of the ontology classes of entities and their properties. In this way you can get to know the news domain as well as the conceptual model used to formalize it.
The Ontology screen consists of two panels. The first one is the Available entity classes field displaying the ontology tree where all classes are presented as hyperlinks. The second one appears when you click one of these hyperlinks and gives you a detailed description of the selected ontology class.
The PROTON ontology defines about 300 entity classes and 100 properties. All classes that represent categories of objects or phenomena in the applied domain are defined as sub-classes of "Entity". Then, a further distinction is made between three main entity classes:
- Object – existing entities, such as agents, statements, locations
- Happening – events, situations, and time intervals
- Abstract – abstractions that are neither objects nor happenings
Each of these three is further sub-divided into other classes, representing concepts of general importance such as commercial, government, and other organizations (the class "Organization"), people (the class "Person"), various locations (the class "Location"), different types of employment (the class "Job Position"), etc. There are also different characteristic attributes and relations defined for each class. To learn more about the default ontology, please see PROTON Guidance.
Clicking one of the hyperlinks in the ontology tree opens a new panel with a detailed description of the selected ontology class. The new panel displays the following:
- The main characteristics of the selected class.
- A short definition or what is the accepted meaning of this term in the ontology representation.
- The relations defined for the selected class.
To explore the full list of relations defined for the selected class, click the icon in the top right corner of the class description panel.
You can also explore all objects that are related to the selected class. The ones you can browse are marked as hyperlinks in red.
You can also use the other icons in the top right corner of the panel in the following way:
- To return to the short list of main relations, use the icon.
- To see all documents where the entities from the selected class occur, use the icon. You are directed to the Document Query Result screen.
- To navigate back and forth through the class descriptions you have already checked, use the icons.