The present document is part 3 of the Stage 3 specification for an Application Programming Interface (API) for Open Service Access (OSA). The OSA specifications defie an architecture that enables application developers to make use of network functionality through an open standardxed interface@ i.e. the OSA APIS. The present document specif?es the Framework aspects of the interface. All aspects of the Framework are defined in the present document@ these being: ? Sequence Diagrams ? Class Diagrams ? Interface specification plus detailed method descriptions ? State Transition diagrams ? Data Definitions ? IDL Description of the interfaces The process by which this task is accomplished is through the use of object modelling techniques described by the Unified Modelling Language (UML).