TIBCO Enterprise Message Service extends the MapMessage and
StreamMessage body types in two ways. These extensions allow TIBCO Enterprise Message Service to exchange messages with TIBCO Rendezvous and ActiveEnterprise formats that have certain features not available within the JMS specification.
These extensions add considerable flexibility to the two body types. However, they are extensions and therefore not compliant with JMS specifications. Extended messages are tagged as extensions with the vendor property tag
JMS_TIBCO_MSG_EXT.