Want to group diagram elements into vertical or horizontal stacks? Since Sirius 3.1, it is possible.With Sirius 3.0, it was already possible to create compartments, but we had introduced it as an "experimental" feature since some behaviors were not supported yet. Now compartments are fully operational and a new tutorial is available.Consider this diagram that represents persons and their parental relationships.On this diagram, if you focus on Elias, you can directly see his parents (Paul and Isa) and his children (Bryan, Clara, Dave and Fiona). And, as you understand the semantic of the father and mother relationships, you can easily guess who is his sister (Léa), and who are his grandchildren (John, Mary, Sophia, Emma, Fred and Alain).These relationships (siblings and grandchildren) could also be graphically represented with a derived link. But if you use edges to represent all the differents kinds of relationships, what you may finally get is a real spaghetti nightmare! To ...