| Pos |  | Tag | Name | S | R | Repr |  | Notes | 
        
          | 010 |  |  | 
            
              | MESSAGE REFERENCE NUMBER |  
              | Unique message reference assigned by the sender. |  | M | 1 | an..14 |  |  | 
        
          | 020 |  |  | 
            
              | MESSAGE IDENTIFIER |  
              | Identification of the type, version etc. of the message being interchanged. |  | M | 1 |  |  |  | 
        
          |  |  |  | 
            
              | Message type |  
              | Code identifying a type of message and assigned by its controlling agency. |  | M | 1 | an..6 |  |  | 
        
          |  |  |  | 
            
              | Message version number |  
              | Version number of a message type. |  | M | 1 | an..3 |  |  | 
        
          |  |  |  | 
            
              | Message release number |  
              | Release number within the current message type version number (0052). |  | M | 1 | an..3 |  |  | 
        
          |  |  |  | 
            
              | Controlling agency |  
              | Code to identify the agency controlling the specification, maintenance and publication of the message type. |  | M | 1 | an..2 |  |  | 
        
          |  |  |  | 
            
              | Association assigned code |  
              | A code assigned by the association responsible for the design and maintenance of the message type concerned, which further identifies the message. |  | C | 1 | an..6 |  |  | 
        
          | 030 |  |  | 
            
              | COMMON ACCESS REFERENCE |  
              | Reference serving as a key to relate all subsequent transfers of data to the same business case or file. |  | C | 1 | an..35 |  |  | 
        
          | 040 |  |  | 
            
              | STATUS OF THE  TRANSFER |  
              | Statement that the message is one in a sequence of transfers relating to the same topic. |  | C | 1 |  |  |  | 
        
          |  |  |  | 
            
              | Sequence of transfers |  
              | Number assigned by the sender indicating the numerical sequence of one or more transfers. |  | M | 1 | n..2 |  |  | 
        
          |  |  |  | 
            
              | First and last transfer |  
              | Indication used for the first and last message in a sequence of the same type of message relating to the same topic. |  | C | 1 | a1 |  |  |