Overview#OpenID Connect Federation specifies how a Relying Party (RP) can discover metadata about an OpenID Connect Provider (OP), and then register to obtain client credentials.
During discovery and registration there is no automated mechanism for the OpenID Connect Provider or the Relying Party to verify the information exchanged during this process. All the information is self-asserted.
OpenID Connect Federation describes how an identity federation can be built around a trusted third party, the federation operator.
Some other OpenID Connect Federation spcifications: