!!! Overview
[{$pagename}] is defined in [OpenID Connect Session Management] as a [REQUIRED] (for [OpenID Connect Session Management])  [OpenID Connect Discovery] [parameter] that is the [URL] of an [OpenID Connect Provider] [iframe] that supports [cross-domain] communications for [session] state information with the [Relying Party] [Client], using the [HTML5] [postMessage] [API]. 

The page is loaded from an invisible [iframe] embedded in an [Relying Party] page so that it can run in the [OpenID Connect Provider]'s security context. The [URL] accepts postMessage requests from the relevant [RP] [iframe] and uses postMessage to post back the login status of the [End-User] at the [OpenID Connect Provider].


!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]