Currently none.
- Upgrade to .net framework 4.5
- Make use of new types in BCL: Lazy (instead of own implementation)
- Remove unused references (Windows.Forms)
- Remove dependency on Microsoft Enterprise Library
- ObjectBuilder (dependency injection): this should not be part of the reference model, but should be in the application that uses the model. A better supported DI framework should be used (like Autofac, ...)
- Configuration: An implementation of retrieving terminology is provided, but this should not be part of the reference model.