this boolean array symbolizes for each node type if yes or no it is displayed, with effet also on edges)... It apparently replaced around 2015 the earlier convention with types A, B, AB... it is often used (symbolizing for each node type if yes or no it is active)... it was sometimes named states (very confusing with the other 'states' that record user interaction steps and that also contain info about these activetypes) or type (misleading singular)