I’m happy to report that the OpenID Connect Relying Party Metadata Choices specification has been approved by the OpenID Foundation membership as an Implementer’s Draft. An Implementer’s Draft is a stable version of a specification providing intellectual property protections to implementers of the specification.

The need for this was independently identified by Roland Hedberg and Stefan Santesson while implementing OpenID Federation. The contents of the specification were also validated by Filip Skokan, who implemented it. Filip has been added as an author.

The abstract of the specification is:

This specification extends the OpenID Connect Dynamic Client Registration 1.0 specification to enable RPs to express a set of supported values for some RP metadata parameters, rather than just single values. This functionality is particularly useful when Automatic Registration, as defined in OpenID Federation 1.0, is used, since there is no registration response from the OP to tell the RP what choices were made by the OP. This gives the OP the information that it needs to make choices about how to interact with the RP in ways that work for both parties.

Thanks to all who contributed to reaching this milestone!