When you select a script fragment, the Script Object tab in the Object palette displays the fragment properties.Sets the source file for the fragment reference. This property is visible only when the selected object is a fragment reference.This property is visible when a fragment reference or a fragment that is defined in a source file is selected. When the selected object is a fragment reference, this property does not appear if the source file is not specified. The Fragment Name list includes all the fragments in the specified source file. The Custom option directly supports setting a SOM expression or an ID value as the fragment reference and supports the implementation in the XML Forms Architecture.