For customizing JCA trees, various attributes on the tags are specified. All attributes supported on JCA tree tags are supported on the MVC beans. Each JCA tree is represented by interface TableDefinition. The class implementing the TableDefinition would implement methods that can be used to populate the configurable attributes on the beans. So the attributes which were previously configured for the tags should now be populated on corresponding beans mentioned above. For detailed information on defining the TableDefinition refer to Constructing and Rendering a Table Using the JSP Framework.