Network Security Access Restrictions in Silverlight. The Silverlight policy file format is described below using a DTD.
The following table describes the possible ELEMENT entries. The following table describes the possible ATTRIBUTE entries allowed on an ELEMENT. The uri attribute of the domain element refers to the domains and specific Silverlight applications that are granted access to the paths specified by the <grant-to> element tags within the policy file. The included domain must exactly match the requesting domain. Silverlight. Silverlight 3,4 SDK for Developers on MSDN.