Analyzing Interactions › Summary of Interaction Modeling Rules › Rules for Entity Life-Cycles
Rules for Entity Life-Cycles
The following rules apply to life-cycles but are not directly enforced by CA Gen:
- Each entity has a life that must pass through at least two states: the creation state and the termination state. The creation state is its first state; the termination state is its last state.
- A null state is never shown as an entity state subtype in the life-cycle partitioning.
- An entity may only change states as the result of a process execution.
- Each entity must, at any point in time, be in one and only one state for each life-cycle.
- For each transition between entity states, there must be an elementary process that may perform that transition.
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