Hello RamReddy,
For example, in business role SALESPRO->account management, search an account id and display it. There is a 'Planned activities' assignment block BP_BPBT/AccountActivitiesOV. go to BP_BPBT/AccountActivitiesOV , display CL_BP_BPBT_ACCOUNTACTIVIT_IMPL->DO_PREPARE_OUTPUT, we can see it is using BuilHeader's relation 'BuilActivityRel' to get activity list. Object for any entry of the list is 'BuilActivity', in BT126H_Appt/ApptDetails, values of 'BuilActivty' is displayed.
Best Regards, Corrine