MUST support Liberty ID-WSF 2.0 Discovery Service specification [Disco2]
MAY support UDDI, however this may require significant extensions to UDDI. Such extensions would need to be profiled.
See [NexofRA09], section 5.4 "The Overview-Model", fig 18, for a view of the interaction between service registration and service discovery. Unfortunately the referred document fails to recognize the need for per-identity service registrations, unless the oblique reference, where no difference is made between service requester entity and the data subject, in section 5.4.4 "Service Discovery", counts.