Documenting Mainframe & OpenVMS COBOL
LegacyMap generates comprehensive documentation for COBOL systems running on Mainframe and OpenVMS platforms, including callgraphs, procedure flows, and embedded SQL mapping. By revealing system structure and data interactions, we enable faster onboarding, safer migrations, and long-term maintainability.
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Documenting Mainframe & OpenVMS COBOL with Clarity
LegacyMap is built to handle the complexity of real-world COBOL systems – whether they run on Mainframes or OpenVMS. These applications often span decades of business logic, procedural code, file-based operations, and embedded SQL, with little to no formal documentation. We change that.
With full support for COBOL dialects used across IBM Mainframe and OpenVMS environments, LegacyMap automatically extracts system architecture, procedural flow, and data access logic. From CALL hierarchies to embedded SQL operations, we generate structured, searchable documentation your team can actually use.
Complete COBOL Understanding, No Guesswork
• CALL Tree Generation – Visualize caller-callee relationships across main programs, subprograms, and external routines.
• File and Copybook Parsing – Identify 01-level structures, COPYBOOK dependencies, and file access logic, even in sprawling legacy codebases.
• Embedded SQL Mapping – Detect and map SELECT, INSERT, UPDATE, and DELETE statements in Oracle, Postgres, and Rdb embedded SQL blocks.
• Platform-Agnostic Output – Whether your COBOL runs on z/OS or OpenVMS, LegacyMap provides clean documentation in HTML, PDF, or LaTeX formats.
Why It Matters
• Preserve Mission-Critical Knowledge – Document systems that power banking, insurance, logistics, and government infrastructure – before knowledge is lost.
• Accelerate System Modernization – Lay the groundwork for safe, successful migrations by understanding architecture and data access up front.
• Simplify Maintenance & Support – Reduce reliance on tribal knowledge and manual code tracing with structured, visual insights.
• Enable Better Collaboration – Help analysts, developers, and auditors speak the same language using standardized, shareable documentation.
LegacyMap connects the dots in your COBOL systems – across Mainframe and OpenVMS – so you can move forward with full confidence in what’s behind the code.
Frequently Asked Questions
Curious about how Sector7 can facilitate your application migration? Explore our FAQs for expert insights.
LegacyMap is a software tool that automatically generates structured documentation from legacy COBOL applications, including those running on Mainframe and OpenVMS platforms. It analyzes COBOL source code to produce detailed callgraphs, SQL access diagrams, and procedure maps – without requiring any changes to your original code. LegacyMap is ideal for teams looking to modernize, audit, or maintain legacy COBOL systems while preserving institutional knowledge.
Absolutely. LegacyMap is designed to work across OpenVMS COBOL (including VAX and Alpha systems) and Mainframe COBOL running on z/OS. The tool accommodates platform-specific dialects and embedded SQL formats, giving IT teams a unified documentation workflow for legacy infrastructure. Whether you’re rehosting to Linux or preparing for cloud modernization, LegacyMap delivers the insights you need.
Yes. LegacyMap extracts and visualizes embedded SQL operations such as SELECT, INSERT, UPDATE, and DELETE from COBOL and Pro*COBOL code. It maps SQL table access by program and procedure, making it easier to audit data interactions, refactor database logic, or prepare for migrations to PostgreSQL, Oracle, or cloud-native databases.
LegacyMap produces cross-referenced technical documentation in HTML, PDF, and LaTeX formats, compatible with Doxygen workflows. Outputs include callgraphs, file access mappings, procedure trees, and SQL access flowcharts. This documentation is fully searchable and ideal for developer onboarding, system audits, and modernization projects.
Legacy COBOL systems often lack up-to-date documentation, making them difficult to maintain or migrate. LegacyMap solves this by automating the generation of accurate, detailed documentation that reflects the current state of your system. This reduces operational risk, improves code maintainability, and accelerates digital transformation initiatives involving legacy technologies like COBOL, FORTRAN, BASIC, and embedded SQL.
Sector7 offers a free code assessment to evaluate your migration requirements and provide initial project insights. This assessment helps identify potential challenges and opportunities before your migration begins. Get in touch to schedule your free assessment.
