Developed sample application - TaskFlowParamaters.zip is based on standard HR schema, Departments and Employees entities. Unbounded task flow contains selectDepartments page and call to separate bounded task flow. Bounded task flow contains employees page and Task Flow Return component, this component allow to return to calling ADF Task Flow.
When I was creating this application, I have used Fusion Web Application (ADF) as a template for developed sample application. Empty unbounded task flow was created automatically - adfc-config.xml. My next step was to create bounded task flow - task-flow-definition.xml:
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project workspace download :TaskFlowParamaters.zip