AusDigital Identity Provider (IDP) Specification
A federated set of one or more identity providers are the key source of trust for the network. This specificaiton defines a standard taxonomy of OIDC claims and scopes, together with a set of identity assurance levels and a standard way to link identity claims.
Community discussion/support: ausdigital.org
Open source reference implementation: https://github.com/test-point/testpoint-idp/
Test suite: https://github.com/test-point/testpoint-idp
Live test endpoint: https://idp.testpoint.io/