We have now successfully designed, implemented, and tested the
first version of our Family Tree modeling language. This is, however, still only
a first version. Usually at this stage we have learned certain new things about
our problem domain that require us to change, or at least to fine-tune, our
modeling language. Let us now look at a couple of improvements for our Family
Tree modeling language, and get familiar with some of the more advanced
metamodeling and modeling concepts provided by
MetaEdit+
