Change indicators

      UNH    MESSAGE HEADER

      Function: To head, identify and specify a message.

010   0062  MESSAGE REFERENCE NUMBER                              M  an..14

020   S009  MESSAGE IDENTIFIER                                    M  
      0065   Message type                                         M  an..6
      0052   Message version number                               M  an..3
      0054   Message release number                               M  an..3
      0051   Controlling agency                                   M  an..2
      0057   Association assigned code                            C  an..6

030   0068  COMMON ACCESS REFERENCE                               C  an..35

040   S010  STATUS OF THE TRANSFER                                C  
      0070   Sequence of transfers                                M  n..2
      0073   First and last transfer                              C  a1