The append(n:int) operation and its Activity method Append Gallery Tutorial HOWTO simulate UML-2.5.1 'Figure 14.7 Composite State with two States' in Cameo Simulation Toolkit - Operation-driven Transition case study Section Slide kind UML Activity Diagram
Reinserting an existing value at a new position in an ordered, unique StructuralFeature moves the value to that position (this works because such StructuralFeature values are ordered sets). Source Unified Modeling Language 2.5.1
