information that is defined by the application suite, and can be used
to provide additional information about the message or its originator.
The queue manager treats this information as character data, but does
not define the format of it. When the queue manager generates this
information, it is entirely blank.
For the MQPUT and MQPUT1 calls, this
is an input/output field if MQPMO_SET_IDENTITY_CONTEXT or MQPMO_SET_ALL_CONTEXT
is specified in the
If a null character is present, the null and any following characters
are converted to blanks by the queue manager. If neither MQPMO_SET_IDENTITY_CONTEXT
nor MQPMO_SET_ALL_CONTEXT is specified, this field is ignored on input
and is an output-only field. For more information about message context,
see Message context.
After the successful completion of an MQPUT or MQPUT1 call,
this field contains the
was transmitted with the message if it was put to a queue. This will
be the value of
that is kept with the message if it is retained (see description of
MQPMO_RETAIN for more details about retained publications) but is
not used as the
when the message is sent as a publication to subscribers because they
provide a value to override
in all publications sent to them. If the message has no context, the
field is entirely blank.
This is an output field for the MQGET call. The length of this field is given by MQ_APPL_IDENTITY_DATA_LENGTH. The initial value of this field is the null string in C, and 32 blank characters in other programming languages.