Start Level 1 Node: Step TypesStep TypesEnd Level 1 Node: Step Types
   Start Level 2 Node: Receive StepReceive StepEnd Level 2 Node: Receive Step
   Start Level 2 Node: Send StepSend StepEnd Level 2 Node: Send Step
   Start Level 2 Node: Receiver Determination StepReceiver Determination StepEnd Level 2 Node: Receiver Determination Step
   Start Level 2 Node: Transformation StepTransformation StepEnd Level 2 Node: Transformation Step
   Start Level 2 Node: User DecisionUser DecisionEnd Level 2 Node: User Decision
   Start Level 2 Node: SwitchSwitchEnd Level 2 Node: Switch
   Start Level 2 Node: Container OperationContainer OperationEnd Level 2 Node: Container Operation
   Start Level 2 Node: Control StepControl StepEnd Level 2 Node: Control Step
   Start Level 2 Node: BlockBlockEnd Level 2 Node: Block
   Start Level 2 Node: ForkForkEnd Level 2 Node: Fork
   Start Level 2 Node: LoopLoopEnd Level 2 Node: Loop
   Start Level 2 Node: Wait StepWait StepEnd Level 2 Node: Wait Step
   Start Level 2 Node: Undefined StepUndefined StepEnd Level 2 Node: Undefined Step