The sun-application.xml visual editor lets you edit the application's platform-specific deployment descriptor for the Sun Java System Application Server. You open the visual editor by expanding your project's Configuration Files node in the Projects window and double-clicking the sun-application.xml file.
Determines whether EJB modules use pass-by-value or pass-by-reference semantics. If false (the default if this element is not present), this application uses pass-by-value semantics, which the EJB specification requires. If true, this application uses pass-by-reference semantics. The setting of this element in the sun-application.xml file applies to all EJB modules in the application.
Optional authentication realm name, which is used to process all authentication requests associated with this application. If this element is not specified (or if it is given but does not match the name of a configured realm) then the default realm set in the server instances security-service element will be used instead.
For more on security-service element , see "security-service" in the Sun Java System Application Server Administration Reference: