From the perspectives of the federation projects I am involved in I see following high-level use cases/constellations that have a need for attribute management:

- C10: Delegated Identity Management (basic use case with IdP managing attributes)

- C20: Service Provider Centric model (IdP provides attributes)

- C32: Identity Federation

- C33: Cross Border Identity Federation

- C40: Attribute Provider separate from IdP

- C41: Attribute Provider with RP (Canda Gov. use case)

- C50: Enterprise user

- C60: Subject Types (devices)

- Rainer