Response providers are plug-ins that provide policy response attributes. Policy response attributes typically provide values for attributes in the user profile. The attributes are sent with policy decisions to the PEP which, in turn, passes them in headers to an application. The application typically uses these attributes for customizing pages such as a portal page. OpenSSO Enterprise includes one implementation of the com.sun.identity.policy.interfaces.ResponseProvider class, the IDResponseProvider. See Chapter 2, Using the Policy Service API, in Sun OpenSSO Enterprise 8.0 Developer’s Guide for more information.