The purpose of Domains is explained in more detail in the Rule Modeling Guide's Build the Vocabulary topics. Generally, if all your Entity names are unique, you won't need to use Domains in your Vocabulary. To add a Domain node:

  1. Select the name node in the Vocabulary tree view, which is the one with the icon.
  2. Do one of the following:

    • Right-click to display the pop-up menu and choose Add Domain

    • Choose Vocabulary > Add Domain from the menubar.

  3. Select the new Domain node in the Vocabulary tree to display its properties.
  4. Assign a Name for the new Domain in the Property Value column to the right, as shown below. Or, double-click the new Domain node in the tree view to edit the default Domain_1 value. Your changes in either location will be updated in both.