Introduction


This unit will deal with the following issues:

This lesson describes about the Service-oriented software systems (SOSS).
The relation between the requirements specification and the architecture of SOSS are discussed and also the
crucial elements of the requirements specification of SOSSs.
Service orientation is not to be limited to Web services and Internet only.
The conditions are the application of peer-to-peer philosophy, user-oriented interfaces of services and the
combination of different technologies of communication between services (seemingly the obsolete ones
inclusive), and autonomy of the services.
The lesson then explains peer-To-peer information systems, historical technologies used in service-oriented
systems, implement issues and requirements specification issues.