2. Scroll to the bottom of the page where the footer is located. Notice that both the FooterCanada and Footer US fragment references are placed one on top of the other in the subform set. However, depending on the data, only one footer appears when the form is rendered. Also, because the size was adjusted to fit the bottom of the page, a small icon appears to notify you that there are property overrides on the fragment references.
3. In the Hierarchy palette, select the subform set and, in the Subform Set tab of the Object palette, click Edit Alternatives. The Edit Data Nominated Subforms shows the binding, language, and expression for the alternative footer fragments.
4. Open the Purchase Order US.xml and Purchase Order Canada.xml files using a text editor. Notice that the value for <americas> </americas> is US in Purchase Order US.xml and Canada in Purchase Order Canada.xml. It is this value that determines which fragment is instantiated when the data is merged in the form.