Application class is the entry point of a project. It contains all information used by the project such as Data Model, User-defined DataForms, Data Converter, Data Valider, Commands etc.
Data Model is a simple and abstract model to handle all kinds of data model used in the applications, specially for Data Binding. Each concret data model should implement thoses subclasses. Multiple models should be supported in the same applcaition. But the first targetis EMF model.
This is a generic Data Binding model to manage the Data Presentation.