Messages are converted between WebSphere® MQ format and service integration format as they flow between the two systems.
Usually, you do not have to be aware of conversion between message formats to exchange JMS messages between service integration and WebSphere MQ, because service integration performs the appropriate conversion automatically, including character and numeric encoding. However, you might have to learn about message conversion if your JMS applications do not behave as expected, or if your service integration configuration includes JMS programs or mediations that process messages to or from non-JMS WebSphere MQ programs.
If your service integration applications exchange MapMessage objects with WebSphere MQ applications, you might have to specify a non-default map message encoding format. For more information, see Setting the WebSphere MQ encoding format for JMS Map entries.
For reference information about the mappings for specific message header fields and properties between a service integration bus and WebSphere MQ, see the section Mapping messages between a service integration bus and WebSphere MQ.