|  | AA | 
            
              | Interactive, perform sell |  
              | This sub-function is to notify the receiver that the purpose of the message is an instruction to perform a sell. |  | 
        
          |  | AB | 
            
              | Interactive, modify current dialogue data |  
              | This sub-function is to notify the receiver that the message data is a modification to data previously sent in the current interactive dialogue. |  | 
        
          |  | AC | 
            
              | Interactive, modify previous dialogue data |  
              | This sub-function is to notify the receiver that the message data is a modification to data sent in a previous interactive dialogue. |  | 
        
          |  | AD | 
            
              | Interactive, cancel reserved product |  
              | This sub-function is to notify the receiver that the purpose of the message is to cancel a product previously reserved in an interactive dialogue. |  | 
        
          |  | AE | 
            
              | Interactive, ignore reserved product |  
              | This sub-function is to notify the receiver that the purpose of the message is to ignore a product previously reserved in an interactive dialogue. |  | 
        
          |  | AF | 
            
              | Interactive, conclude current reservation |  
              | This sub-function is to notify the receiver that the purpose of the message is to conclude the current reservation transaction. |  | 
        
          |  | AG | 
            
              | Interactive, display reserved product |  
              | This sub-function is to notify the receiver that the purpose of the message is to display a product previously reserved in an interactive dialogue. |  | 
        
          |  | AH | 
            
              | Interactive, perform reference sell |  
              | This sub-function is to notify the receiver that the purpose of the message is an instruction to perform a sell, based on data returned in a previous interactive response. |  | 
        
          |  | AI | 
            
              | Interactive, modify previous dialogue reservation |  
              | This sub-function is to notify the receiver that the purpose of the message is to modify a reservation, made during a previous interactive dialogue. |  | 
        
          |  | AJ | 
            
              | Interactive, display voucher template |  
              | This sub-function is to notify the receiver that the purpose of the message is to display the template for a voucher. |  | 
        
          |  | AK | 
            
              | Interactive, print voucher |  
              | This sub-function is to notify the receiver that the purpose of the message is to print a voucher. |  | 
        
          |  | AL | 
            
              | Interactive, cancel current dialogue reservation |  
              | This sub-function is to notify the receiver that the purpose of the message is to cancel a reservation made during the current interactive dialogue. |  | 
        
          |  | AM | 
            
              | Interactive, cancel previous dialogue reservation |  
              | This sub-function is to notify the receiver that the purpose of the message is to cancel a reservation made during a previous interactive dialogue. |  | 
        
          |  | AN | 
            
              | Interactive, duplicate sell message |  
              | This sub-function is to notify the receiver that the message is a duplicate of a previously sent interactive sell message. |  | 
        
          |  | AO | 
            
              | Interactive, duplicate modify current dialogue data |  
              | This sub-function is to notify the receiver that the message is a duplicate of a previously sent message to modify data in the current interactive dialogue. |  | 
        
          |  | AP | 
            
              | Interactive, duplicate modify previous dialogue reservation |  
              | This sub-function is to notify the receiver that the message is a duplicate of a previously sent message to modify a reservation made during a previous interactive dialogue. |  | 
        
          |  | AQ | 
            
              | Interactive, availability request, multiple suppliers |  
              | This sub-function is to notify the receiver that the message is an interactive request for availability which is simultaneously being sent to multiple suppliers. |  | 
        
          |  | AR | 
            
              | Interactive, availability request, one specific supplier |  
              | This sub-function is to notify the receiver that the message is an interactive request for availability from only one specific supplier. |  | 
        
          |  | AS | 
            
              | Interactive, product rules request |  
              | This sub-function is to notify the receiver that the message is an interactive request for product rules. |  | 
        
          |  | SECACK | 
            
              | Security acknowledgment |  
              | This sub-function of the AUTACK message is for the secure acknowledgement of receipt, including the reporting of any associated security violation(s). |  | 
        
          |  | SECAUT | 
            
              | Security authentication and/or non-repudiation of origin |  
              | This sub-function of the AUTACK message is for secure integrity, authentication and/or non-repudiation of origin. |  |