Spectrum Writer

The core architecture of Spectrum Writer comprises several key components designed for efficient report generation. The Report Compiler translates 4GL report definitions into executable code. The Data Access Modules provide interfaces for accessing data from various sources, including sequential files, VSAM datasets, and DB2 databases.

These modules handle the complexities of data retrieval and ensure data integrity. The Report Engine executes the compiled report code, applying formatting and calculations to generate the final output. The 4GL Interpreter processes the 4GL scripts, enabling complex data transformations, conditional logic, and custom formatting.

Communication between components is primarily internal, using optimized data structures and function calls within the z/OS or z/VSE/VSEn environment. Data storage is managed through direct interaction with sequential files, VSAM datasets, and DB2 databases. The system does not use intermediate databases.

, DB2). Administration is performed through the system console and configuration files. Security relies on the underlying operating system's security features, such as RACF, for authentication and access control.

The `COMPILE REPORT` command is used to compile report definitions, and the `RUN REPORT` command executes the compiled report. The `DEFINE DATA` command is used to define data sources within the 4GL scripts.