The following extended attributes are available:
| 
                             Extended Attribute  | 
                        
                             Description  | 
                    
|---|---|
| 
                             roleA-default-fetch-group  | 
                        
                             Specifies that roleA is managed as a group with other attributes. Tag name: default-fetch-group  | 
                    
| 
                             roleA-embedded  | 
                        
                             Specifies that roleA should be stored in the instance instead of its own instance. Tag name: embedded  | 
                    
| 
                             roleA-null-value  | 
                        
                             Specifies the null value treatment for roleA. Tag name: null-value  | 
                    
| 
                             roleA-persistence-modifier  | 
                        
                             Specifies the persistence type of roleA. Tag name: persistence-modifier  | 
                    
| 
                             roleB-default-fetch-group  | 
                        
                             Specifies that roleB is managed as a group with other attributes. Tag name: default-fetch-group  | 
                    
| 
                             roleB-embedded  | 
                        
                             Specifies that roleB should be stored in the instance instead of its own instance. Tag name: embedded  | 
                    
| 
                             roleB-null-value  | 
                        
                             Specifies the null value treatment for roleB. Tag name: null-value  | 
                    
| 
                             roleB-persistence-modifier  | 
                        
                             Specifies the persistence type of roleB. Tag name: persistence-modifier  |