For forms that are bound to data sources, you can associate a data element with a form object, such as a field or a subform. This association is called data binding. You can choose objects that shrink or grow depending on the amount of data they display.Many data binding definitions can produce the same results when a form is rendered. However, the more obvious the relationship between the form object and its data element, the more efficiently LiveCycle Forms ES can process the data binding.The following diagram shows a field binding example where two field objects in the form are bound to data elements. The binding is ambiguous because multiple instances of the field objects and their data exist. More processing is required to match the nth occurrence of each object to the nth occurrence of the corresponding data when rendering the form.
The following diagram shows the use of subform binding to group objects and thereby simplify the processing to render the form. The subform is bound to the repeating group in the data, eliminating the ambiguous binding. The binding is evaluated for the first group and does not need to be re-evaluated for subsequent repetitions.