As mentioned in Chapter 24, “IBM API declarative cooperative portlets” on page 741, each action in a cooperative portlet is associated with a single input parameter and zero or more output parameters that provide information to the action about the objects in which the property value should be bound, such as the request object or the session object.
Cooperative portlets using the programmatic approach require that you create a wire; for details about creating wires, see 25.5.4, “Wire portlets” on page 793 and 25.4, “Wiring tool” on page 778. This is because property values are transferred to the target portlets only if wires have been created.
Each parameter is associated with exactly one property. ...