Components of IDM SAP Identity Management 8.0 Developer Studio?

Hi Experts - I have been doing researches on the simplest definitions of the SAP Identity Management 8.0 Developer Studio components below and by minimum what components are required to be installed to use in full extent the functionalities of the SAP IDM 8.0 Developer Studio?

Developer Studio Service

User Interface

SAP Identity Management 8.0 REST Interface Version 2

SAP Identity Management 8.0 User Interface for HTML5

SAP Identity Management 8.0 Portal Content

Identity Federation