Available message types in JMS?

Question

This is based on a past exam question.

The question is to describe the four message types using JMS .

The problem is that four, not four. Therefore, he suggests that there are only four of them, nothing more.

However, according to this site , there seem to be five ;

• Streams
• cards
• text
• objects
• byte

* Another book says that XML is another potential type in future versions of JMS. Is XML available?

Am I missing something or is the question wrong?

Thank.

EDIT: There are 5 types

Answer 1

Sun JMS Spec 1.1 3.1.1 . .

Answer 2

XML, .