If the data source on which your model is based includes foreign key definitions, these definitions are automatically expressed in your model when you create a model from an existing data source with the New Model Wizard. But if you are creating the schema within EOModeler, you need to define relationships in the model editor.
EOModeler provides two mechanisms for forming relationships. You can form them in the model editor’s diagram view or in the Relationship Inspector. Using the diagram view is the quickest way to create new relationships, but using the Relationship Inspector gives you access to more relationship characteristics. Each mechanism is discussed in the following sections.