When creating some controls, you specify whether you want to make the control instance a control factory. A control factory allows a single application to manage multiple instances of the same control. File, Email, JCA, WLI JMS, TPM, and Worklist controls can be implemented as control factories.
To make a control a control factory, select the Make this a control factory that can create multiple instances at runtime check box when creating the control. When you add a control to a business process, if the control is a factory, the first argument of the control receive method is the controltype. This is displayed in the node builder assignment and mapping panel and you can assign and map to it.