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Figure 1.3. element [Image http://docs.redhat.com/docs/en-US/JBoss_Enterprise_Application_Platform/5/html/Security_Guide/images/j2ee_security_role.jpg] In JBoss, a element is only used to map or values to the logical role that the component role references. The user's assigned roles are a dynamic function of the application's security manager, as you will see when we discuss the JBossSX implementation details. JBoss does not require the definition of elements in order to declare method permissions. However, the specification of elements is still a recommended practice to ensure portability across application servers and for deployment descriptor maintenance.