The ‘Family Tree’ project we opened is empty: it does not contain any models or method definitions—yet. It is all clean and ready for us to implement our Family Tree modeling language. In order to do this, we must enter the Family Tree metamodel into MetaEdit+. MetaEdit+ provides two different approaches for this: graphical and form based metamodeling. When adopting the first one, the metamodel is drawn with MetaEdit+ using graphical GOPRR notation (as shown in Figure 1-3) and then loaded into the tool. For the latter one, MetaEdit+ provides tools for creating and managing each metatype. While graphical metamodeling probably suits better for beginner-level metamodelers and for documenting the metamodels, we are still going to utilize form-based metamodeling tools while walking-through this tutorial. This is because some advanced tasks at the latter part of the tutorial require the use of form-based tools and therefore it is preferable to systematically work with the same set of tools throughout the whole exercise.