The Protégé Short Note (Part 3)

OWL Properties

Three types of properties in OWL-examples
  • Object properties and Datatype properties can be marked as Annotation properties.(If we want)
  • As a convention “has” or “is” are used as prefixes for Object and Datatype properties.

1. Object Properties

As shown above, Object properties represent relationships between two individuals. They can be created using the Object Properties tab in Protégé. Click on owl:topObjectProperty and then on newObjectProperty button if you want to add only one property or right click and Add sub properties… if you want to add a hierarchy of properties as we did in adding classes before.

preview of Object Properties tab

1.1 Inverse properties.

Every object property may have a corresponding inverse property. So, as shown here if a property link individual A to B, it’s inverse property link individual B to A. We can create inverse properties using the inverse of button in the property description view (see above).

1.2 Characteristics of OWL Object properties.

The Property Characteristics view.
summery of characteristics of Object properties



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