Managing Classes

You can update the Classes of an ontology.

Use the Search to find specific Classes.

This task shows you how to:

Add a Class

  1. In the Ontology, click the Classes tab.
  2. Click
    The Create a Class dialog box appears.
  3. Type the Label and select the type of Class (OWL Class or RDFS Class).

    The URI is generated on the fly from the Class label entered (if English is selected), otherwise a UUID (Universally unique identifier) based URI is generated.

    Note: Labels entered are in the language you selected in your Preferences.

  4. Click Ok.

Update a Class

  1. In the Ontology, click the Classes tab.
  2. Select a Class and update the fields.

    Note: The URI and Type fields are not editable.

    Depending on the type of the class (RDFS or OWL), you can add super classes, equivalent classes, or classes with which the class is disjoint.

    RDFS Class OWL Class
    RDFS Class Sub Class of Yes Yes
    OWL Class Sub Class of Yes Yes
    Equivalent To NA Yes
    Disjoint with NA Yes

  3. Optional: If you want to edit or display additional properties (other than built-in properties):
    1. Click > More
    2. In the Search properties field, enter the label of the property you want to add.

      An autocomplete list appears.

      Select the property you want to add and click .

      Note: The list of properties is retrieved from the current ontology and from all its prerequisite ontologies. Datatype, Object and Ontology properties are not proposed.

    3. In the property line, add the values.

      Depending on the property configuration, you can add Literal, or/and URI values.

      For example, you can add:
      • Literal value: a property whose values are literals. Click to add a literal value.
      • Resource value: a property whose values are URI resources.
      • Resource or Literal value: a property whose values are URIs or literals. Click to add a literal value. Enter a URI name (autocomplete) to add a URI.
      Note: If the property is functional, only one value can be provided.

    4. To delete an additional property, remove all its resources.
  4. Click Update.

    Click Reset to ignore changes since last update.

Delete a Class

  1. In the Ontology, click the Classes tab.
  2. Click next to the Class you want to delete.

    You can also click on the Class and click .

    A dialog box asking if you want to delete the Class appears.
  3. Click Yes.