Hi Soumya,
In HRASR_DT T-code Form Scenario is assigned to a Process to start the step and in Form Scenario we define Fields which can be infotype fields or custom fields also Back-End Services is also defined and creation of FPM application config in which Form design is done, So when ever the
Process is called in turn Form Scenario is called which is assigned to that process and the infotypes that are defined in the scenario so those infotype data is called from those infotype tables which ever
Back-End Services you define in Scenario those infotype data is retrieved.
HRASR_DT T-code when you expand the Form Scenario you can some child nodes Fileds, Form etc
in Form FPM Config should be created and in FPM Config just Form design is done whatever fields you define in HRASR_DT those are visible in Config and Feeder class is also defined by default.
In Form Child node only for Composite uibb type you can define a freestyle uibb i.e., WD Component.
Regards
Madhukiran.