FORMS - linking views by master-detail relationship

In Forms, creating a master-detail form on two TABLES is easy :

• create the tables
• create a foreign key constraint
• 'default' the master block
• 'default' the detail block (referring to the constraint)

How can I do the same to create a master-detail form on two VIEWS ??

Kevin Johnson                      EMAIL  :  johnson_at_mail.esrin.esa.it
Information Administrator
European Space Agency              DISCLAIMER :  These views are mine
ESRIN, FRASCATI, ITALIA.                         not necessarily those
                                                 of my employer.