Control models are organized using the following hierarchical structure. Details on each layer are provided in corresponding rules.
Top layer (root level), jc_0311: Top layer/root level
Trigger layer, jc_0321: Trigger layer
Structure layer. jc_0331: Structure layer
Data flow layer, jc_0341: Data flow layer
Use of the Trigger level is optional. In the following figure, Type A shows the use of a trigger level while Type B shows a model without a trigger level.