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To create a control loop, a user creates a TOSCA Topology Template. In the Topology Template, the user creates a TOSCA Node Template for each Control Loop Element that will be in the Control Loop Definition. Finally, the user creates the Node Template that defines the Control Loop itself, and references the Control Loop Element definitions that make up the Control Loop Definition.

The best way to explain how to create a Control Loop Definition is by example.

3.1 The Gentle Guidance Control Loop

The Gentle Guidance control loop is illustrated in the diagram below.

4. Creating Custom Control Loop Elements

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