1.2  Index of message types by name

     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

   Code  Name                                      Version Rev

*| AVLREQ Availability request - interactive message     1        2
*| AVLRSP Availability response - interactive message    1        3
|  RESREQ Reservation request - interactive message      1        3
|  RESRSP Reservation response - interactive message     1        4
+  TIQREQ Travel, tourism and leisure information        1        1
          inquiry request - interactive message
+  TIQRSP Travel, tourism and leisure information        1        1
          inquiry response - interactive message