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Technical Capabilities
LANGUAGES
VX/COBOL - OpenVMS COBOL to ANSI COBOL
VX/C - OpenVMS C to ANSI C
VX/FORTRAN - OpenVMS FORTRAN to ANSI FORTRAN
VX/PASCAL - OpenVMS PASCAL to ANSI C++
VX/BASIC - OpenVMS BASIC to ANSI C
DCL
VX/CDD - OpenVMS CDD
VX/SOR - OpenVMS SORT MERGE
VX/JSP - OpenVMS Print & Batch
VX/DCL - OpenVMS DCL
VX/CLD - OpenVMS CLD Compiler
VX/MMS - OpenVMS MMS to make and XML
VX/LCKMGR: OpenVMS Lock Manager
API
CLI$ - OpenVMS Command Interface
CONV$ - File Conversion
VX/RT APIs
STR$ - STRING Interface Routines
LIB$ - General Routines
COB$ - COBOL Support Routines
SYS$ - SYS$ Interface Routines
PAS$ - PASCAL Support Routines
FORMS$ - DECFORMS Integration
OTS$ - Data Conversion Routines
MTH$ - MATH Routines
BAS$ - BASIC Runtime Support
EXE$ - Operating System Interface
FOR$ - FORTRAN Support Routines
EDT$ - Callable Editor
FMS$ - Forms Management System
LBR$- Callable Librarian
SMG$ - Screen Management
SOR$ - Interface to SORT
SQL$ - SQL Database Interface
FDL$ - File Definition Language
DEC FORMS/SCREENS
VX/SMG - SMG
VX/FMS - OpenVMS Forms Management
VX/DECFORMS - DECforms IFDL Compiler and FORMS$
RMS
VX/DATAX - OpenVMS RMS Data exchange
VX/FDL - File Description Language Routines
VX/RMS - SYS$ Routines for RMS
ACMS
VX/RTR - OpenVMS RTR V2 to Async RTR V3
VX/DMQ - OpenVMS DMQ (PAMS) for x86 Linux
VX/ACMS - OpenVMS ACMS(TDF,MDF,GDF,ADF) to C++
RDB
VX/PF2PC-FORTRAN - FORTRAN with embedded SQL to Pro*C
VX/SQLMOD- SQLMOD to Embedded SQL
UTILITIES
VX/CDD - OpenVMS CDD
VX/JSP - OpenVMS Print & Batch
VX/CLD - OpenVMS CLD Compiler
VX/MSG - OpenVMS Message Compiler
VX/MMS - OpenVMS MMS to make and XML
VX/LCKMGR: OpenVMS Lock Manager
VX/DATAX - OpenVMS RMS Data exchange
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FDL$ - File Definition Language

FDL$ - File Definition Language

Overview

VX/FDL$ provides a call-compatible implementation of OpenVMS File Definition Language (FDL$) APIs for x86 and ARM Linux. It enables OpenVMS applications to define, generate, and manage file structures while maintaining compatibility with existing workflows.

Key Features

• Fully compatible with OpenVMS FDL$ APIs.

• Supports file structure definition, parsing, and management.

• Allows seamless migration of OpenVMS applications relying on FDL$ routines.

• Integrates with VX/RT to provide full OpenVMS file definition capabilities on x86 and ARM Linux.

• Maintains OpenVMS file structure semantics to ensure consistent behavior on Linux.

VX/FDL$ Callable Routines

FDL$ API Function
FDL$CREATECreate an FDL file
FDL$GENERATEGenerate FDL structure
FDL$PARSEParse an FDL file
FDL$RELEASEReleases file definition resources

Why Use VX/FDL$?

• Preserves OpenVMS file structure logic, enabling direct porting of applications.

• Provides full compatibility with OpenVMS FDL$ file management functions.

• Supports critical OpenVMS file definition workflows, including structure generation and parsing.

• Seamlessly integrates into the VX/RT ecosystem for OpenVMS compatibility on x86 and ARM Linux.

VX/FDL$ ensures that OpenVMS applications requiring FDL$ services can be migrated without major modifications, preserving productivity and minimizing development costs.

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Frequently Asked Questions

Curious about how Sector7 can facilitate your application migration? Explore our FAQs for expert insights.

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What is VX/FDL$ and how does it help with OpenVMS migration?

VX/FDL$ provides a call-compatible implementation of OpenVMS File Definition Language (FDL$) APIs for x86 and ARM Linux. It enables seamless migration of OpenVMS applications that rely on FDL$ routines for file structure definition, parsing, and management while maintaining compatibility with existing workflows. Contact us to discuss your OpenVMS to Linux migration requirements.

Which FDL$ APIs are supported by VX/FDL$?

VX/FDL$ supports the core FDL$ callable routines: FDL$CREATE for creating FDL files, FDL$GENERATE for generating FDL structures, FDL$PARSE for parsing FDL files, and FDL$RELEASE for releasing file definition resources.

Does VX/FDL$ maintain OpenVMS file structure semantics?

Yes, VX/FDL$ maintains OpenVMS file structure semantics to ensure consistent behavior on Linux platforms.

How does VX/FDL$ integrate with other VX tools?

VX/FDL$ seamlessly integrates with VX/RT to provide full OpenVMS file definition capabilities on x86 and ARM Linux systems.

What file management functions does VX/FDL$ provide?

VX/FDL$ provides full compatibility with OpenVMS FDL$ file management functions, including file structure definition, parsing, and management. This enables direct porting of applications without major modifications, preserving productivity and minimizing development costs. Organizations like Allianz have successfully migrated similar OpenVMS systems to Linux.

Can existing OpenVMS applications use VX/FDL$ without modifications?

VX/FDL$ preserves OpenVMS file structure logic, enabling direct porting of applications that rely on FDL$ routines.

What platforms does VX/FDL$ support?

VX/FDL$ supports both x86 and ARM Linux platforms, providing flexibility for different hardware architectures.

What are the key benefits of using VX/FDL$ for migration?

VX/FDL$ eliminates the need for extensive application rewrites by providing call-compatible OpenVMS FDL$ APIs on Linux. This preserves existing file definition workflows while enabling migration to modern, cost-effective Linux infrastructure.

The tool ensures that critical OpenVMS file definition workflows, including structure generation and parsing, continue to function seamlessly. Companies like BNY Mellon have leveraged similar OpenVMS compatibility tools for successful migrations. Contact our team to learn how VX/FDL$ can streamline your OpenVMS to Linux migration.

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