|  | Change indicators |  | 
            
              |  | a plus sign (+) ==> for an addition |  | 
            
              |  | an asterisk (*) ==> for an amendment to structure |  | 
            
              |  | a hash sign (#) ==> for changes to names |  | 
            
              |  | a vertical bar (|) ==> for changes to text for descriptions, notes and functions |  | 
            
              |  | a minus sign (-) ==> for a deletion |  | 
            
              |  | an X sign (X) ==> for marked for deletion |  | 
            
              |  | a letter R (R) ==> for a message whose structure has been completely recast. No other change symbols shall be used with this message
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