Form data population and extraction

For forms that contain a data model (XForms or XML Model), do not populate data or extract data for individual elements:

• When populating a form with data for all elements within an instance, populate the entire instance at the root level. Populating elements individually is much slower.
• When populating a form with data for all child elements of a parent, populate the parent element at the sub-root level. Populating child elements individually is much slower.
• When extracting data from a form, extract the entire instance. Extracting elements individually is much slower.