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How the headers are processed

 

The Format parameter of each MQ header is read by the MCA. The Format parameter is 8 bytes within the header, which are 8 single-byte characters containing a name.

The MCA then interprets the data following each header as being of the named type. If the Format is the name of a header type eligible for MQ data conversion, it will be converted. If it is another name indicating non-MQ data (for example MQFMT_NONE or MQFMT_STRING) then the MCA stops processing the headers at this point.

 

Parent topic:

Message conversion outside the message exit

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