You can create a direct association between an existing requirement and an existing domain element. This directly links the requirement and the domain element and synchronizes both artifacts so you can manage them as a single, conceptual item.
By default, the integration directly associates use-case requirements and use-case domain (model) elements. This creates a one-to-one, exclusive relationship between the use-case artifacts.
These instructions assume that your project properties are configured with the default properties on the Link Policy page, in which use-case domain elements and use-case requirements are linked with direct associations. You can customize your Link Policy properties to directly link other domain element and requirement types.
To create a direct association:
As an alternative to using the menu items described above, you can drag a requirement to a domain element or drag a domain element to a requirement.