The following topics describe how to access
parts of the message tree other than the message body data. These parts of
the logical tree are independent of the domain in which the message exists,
and all these topics apply to messages in all supported domains, including
the BLOB domain. You can access all parts of the message tree using a JavaCompute
node, including the Properties tree described in
Message tree structure,
and the
ExceptionList tree. Elements of
the message tree can be accessed in the same way as the message body data,
using a JavaCompute node.