MDMI_ — Default language settings

MDMI currently forces the user to enter a language reference every time one writes any one of the four types of expressions. The modeler should able to enter a set of default types that would hold unless overwritten by a local attribute value.

The MessageGroup class will add six attributes that define a default language that will hold for all for all classes in the message model unless locally over-ridden. MDMI does not choose any expression language, allowing the user to specify them. However, there required constraints for each of these languages. These constraints are outlined in the property description of each default language type.