Here is another heads up from the BonitaSoft documentation team about using widgets to create data form fields.
BOS 5.6.1 Form widgets
We have made a short video which shows how to simply drag and drop widgets onto the Form Builder framework, and create your own customized form data fields. With over twenty widgets to choose from in the widget palette, from text fields to iframe fields, date fields to image fields, you can create a range of form fields to suit your needs.
See the video here : How to use widgets to define form data fields and buttons
(Note: you have to log-in first, or create an account).
Go see other useful videos tutorials about Bonita Open Solution here, at the BonitaSoft documentation video library.
Have fun with Bonita!