Setting access control : System Architect Catalog Manager : Roles : Adding role expressions
  
Adding role expressions
To add a role expression
1 Click the root Roles node to expand it.
2 Right-click the role that you will add to another role as a Role Expression, and select Copy.
3 Right-click the role to which you are adding a role as a role Expression, and select Paste.
4 Repeat the steps above for each role that you want to add as a role Expression.
5 Click the node for the role to which you added one or more role Expressions, and then click the Role Expressions node.
The roles you added now appear on the right pane.
See also
Roles