You can reference an existing field or form when you build a new form. By reusing components in your application, you save time and avoid duplication.
The following restrictions apply when reusing a field or form:
You cannot change the field type.
You cannot change the class of a field group or repeating field group.
You cannot change the data type that is associated with a data reference.
You cannot reuse single-value fields that are defined in a repeating field group or field group.
Caution: If you change the name of a field after you reuse it on a form, your application creates a new field with the new name.