IFS Service-Oriented Component Architecture is a layered, multi-tier architecture. Core Server includes the core runtime and development frameworks and libraries for IFS business logic.
Base Server contains the framework for for Oracle PL/SQL-based business logic and storage. Middle Tier contains the framework for services layer sub tier of the business logic tier. Access providers are small client-side high-level programming libraries that contain all the functionality and APIs needed for easy access to the business logic.