JCL-Xref

The architecture of JCL-Xref is designed for efficient JCL analysis and reporting on the z/OS platform. The core components include the `Input Processor`, the `Analyzer`, the `Cross-Referencer`, the `Report Generator`, and the `Output Manager`. The `Input Processor` reads JCL from specified datasets, handling various JCL dialects and versions.

The `Analyzer` parses the JCL, extracting relevant information such as job names, step names, program names, dataset names, and DD statements. The `Cross-Referencer` builds relationships between these elements, creating a comprehensive map of dependencies. This component uses internal data structures to store and manage the cross-reference data.

The `Report Generator` formats the cross-reference data into various report types, including jobs using a module, jobs using a dataset, and program-to-dataset cross-references. The `Output Manager` handles the writing of reports to specified datasets or SYSOUT. Communication between components occurs through internal control blocks and data structures.

JCL-Xref utilizes sequential datasets for storing input JCL, intermediate processing data, and output reports. The primary interface is through JCL, with control cards within the `SYSIN` DD statement defining the analysis parameters and report options. Example commands include `ANALYZE`, `REPORT TYPE=JOBS_USING_DATASET`, and `LIST`.

There are no network requirements. Compared to BMC AMI Ops Automation, JCL-Xref focuses more on detailed cross-referencing, while BMC AMI Ops Automation offers a broader suite of automation capabilities. The tool's design prioritizes performance and scalability, ensuring efficient processing of large JCL libraries.

The modular design allows for easy maintenance and future enhancements.