If the input message received by an input node includes message headers that are recognized by the input node, the node invokes the correct parser for each header. You can access these headers using ESQL.
Parsers are supplied for most WebSphere® MQ headers. The following topics provide some guidance for accessing the information in the MQMD, MQRFH2, and MQPCF headers, which you can follow as general guidance for accessing other headers also present in your messages.
For further details of the contents of these and other WebSphere MQ headers for which IBM® Integration Bus provides a parser, see Element definitions for message parsers.