The BOM declares all (internal + 3rd party) dependency versions in dependencyManagement. KIE modules should _not_ directly import this BOM and instead use kie-parent and import specific KIE user BOMs. That is to avoid unnecessary dependencies on UberFire, Dashbuilder or Guvnor for non-UI repositories like Drools, jBPM or OptaPlanner. Platform BOM can be used in cases when one needs to easily inherit all the different versions KIE is using.