You could do something like this:
message = qie.createXMLMessage("<person/>");message.setNode("/person/@mrn", source.getNode("PID-3"));message.setNode("/person/firstName", source.getNode("PID-5.2"));
message = qie.createXMLMessage("<person/>");
message.setNode("/person/@mrn", source.getNode("PID-3"));
message.setNode("/person/firstName", source.getNode("PID-5.2"));