1 message output is defined.
<portlet-preferences> <preference> <name>MsgOutput1Name</name> <value>a_val</value> </preference> <preference> <name>MsgOutput1PublishName1</name> <value>b_val</value> </preference> <preference> <name>MsgOutput1PublishNamespace1</name> <value></value> </preference> </portlet-preferences>