Not able to figure out binding fields for surveys and Visits

Hi,

I want to fetch surveys and visits related records.But I am not able to find their binding fields into AppointmentActivity BO.

I opened COD_VISIT_TI which is bound to AppointmentActivity BO.But not able to get the binding fields for survey ID ,Survey Name ,Visit ID,Visit Name.It always points to the Root element.

Can anyone help me out into this.

Regards,

Vijaya Chavan