The viewItem#toSAX generate SAX events concerning the model (see ViewElement implementation)

And the ModelItem#toSAX does not generate a root tag, it generates events for widget, enumeration, validation infos, but untidily

With all that, it is not possible to add infos concerning a specific definition to the attributes of the root tag

Ex: For user preferences, we have to add the isPrivate info in attributes, but it is not possible for now. ANd the UserPreferencesGenerator has to create the attributes itself