Coding IBM MQ programs in RPG (IBM i only)
In the IBM MQ documentation, the parameters of calls, the names of data types, the fields of structures, and the names of constants are all described using their long names. In RPG, these names are abbreviated to six or fewer uppercase characters.
For example, the field MsgType becomes MDMT in RPG. For more information, see the IBM i Application Programming Reference (ILE/RPG).