You can prefill the fields of an adaptive form using existing data. When a user opens a form, the values for those fields are prefilled. To prefill data in an adaptive form, make the user data available as a prefill XML / JSON in the format that adheres to the prefill data structure of adaptive forms. In this course learn to Prefill adaptive form using the form data model’s request attribute. The value of the request attribute is fetched from the URL of the adaptive form.