Allow EXI as characterization for XML in the JMS body ?

Dear SOAP-JMS Editors,

Could it be possible to allow EXI characterisation (see
http://www.w3.org/TR/exi/) in the message body §2.4 as well ?

Using EXI makes sense in a JMS context for any mission critical system
where latency has to be kept at a the minimum.

EXI would also help a lot :
 - keeping XML processing CPU overhead low (message inspection for
active routing for instance)
 - handling & streaming of huge attachement (base64bin saved as octet
binary set for instance)
 - etc

Regards,
JB BUGEAUD