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The architecture of PL/I for VSEn centers around the PL/I compiler, linkage editor, and runtime library. The compiler translates PL/I source code into machine code, optimizing for the z/VSE environment. The linkage editor combines compiled modules and resolves external references to create executable programs.
The runtime library provides essential support functions, including I/O routines, mathematical functions, and string manipulation. Communication between components is managed through the z/VSE operating system. The compiler uses JCL and compiler options for configuration.
Data storage relies on z/VSE file systems, supporting sequential, indexed sequential, and direct access methods. Security is managed at the z/VSE level, with authentication handled through user IDs and passwords. Audit and logging capabilities are provided by the z/VSE operating system.
The system does not expose any APIs. Network requirements are minimal, as the system primarily operates within the z/VSE environment. The primary interface for administration is JCL and system console commands.
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