!!! Overview
[{$pagename}] is an [OpenID Connect] [OPTIONAL] [Relying Party] [URL] that will cause the [Relying Party] to log itself out when rendered in an [iframe] by the [OpenID Connect Provider]. 

An iss (issuer) [URI Query] [parameter] and a [sid] ([session ID]) [URI Query] [parameter] [MAY] be included by the [OpenID Connect Provider] to enable the [Relying Party] to validate the request and to determine which of the potentially multiple sessions is to be logged out; if either [URI Query] [parameter] is included, both [MUST] be.

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