Step 2: Make Refinements
On this page you can change the name, cardinality and class of the element, consistent with the CIM.
You can restrict the element to a subclass.
The 'by reference' checkbox changes the element from a nested structure to a reference. Its icon change to an '@' symbol and it will be implemented by the appropriate syntax in the XML schema.
You can restrict (but not expand) the cardinality of the element.