A set of authorizations or permissions that reflect the responsibilities of an organizational entity within the organization. A user might belong to multiple roles, and multiple users might belong to a single role.
The responsibilities or actions of the relationship between two nodes. A node with a relationship to another node acts in a role in the relationship. This role indicates the part that the node has in the relationship. For example, in a Dependency relationship, one node has the role Dependent, and the other has the role DependedUpon.