The following steps show you how to add a message mapping output
(target).
From the Navigator view, double-click the mapping file with which
you want to work. The Mapping view appears.
In the resulting Target view, right-click the white space.
From the list, select Add
Message Mapping Output.
From the left view in the Add Message Schemas window select the
message schema (.mxsd)
that you want to use for your output message.
Select the output message that you want to use from the right view.
If the message is from a project that has not been previously referenced
click Next; otherwise click Finish.
If you click Next,
the Add Project Reference view is displayed, in which you can confirm the
project reference in the check box and click Finish. The message structure now appears in the Message Target mapping
view.