You must create a Vocabulary as part of a rule project. The Vocabulary file opens in the Vocabulary editor and has the extension .ecore.

To create a Vocabulary file:

  1. Select File > New > Rule Vocabulary.
  2. In the Create New Vocabulary wizard:
    1. In the Enter or select the parent folder area, select the rule project and optionally, a folder within it.
    2. In the File name field, enter a name for the Vocabulary file.
    3. Click Finish.

The Vocabulary file is created and appears under the rule project in the Rule Project Explorer view. It is represented by a folder icon image and automatically opens in the Vocabulary editor.