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About This Guide

This preface covers the following sections:

Audience for this guide

To use the Databridge application programming interface (API), you must have ALGOL programming experience. In addition, you should be thoroughly familiar with the following:

  • Standard operations for Unisys® MCP-hosted servers
  • Data Management System II (DMSII) databases and Data And Structure Definition Language (DASDL)
  • Transferring files between your host and the system that uses the replicated DMSII data
  • The Databridge host software

This guide does not define DBEngine or DBSupport, and it does not explain how Databridge operates. See the Databridge Host Administrator's Guide for details about Databridge operations.


The following conventions and terms may be used in this guide.

This convention or term Is used to indicate this
menu > sub menu 1 > sub menu 2 ... > menu item (item) This font style/color shows mouse-clicks in the order required to access a specific function, window, dialog box, etc.

The greater than symbol > indicates the next item to click in the series.

The parentheses ( ) indicate the setting, option, or parameter being discussed. Note the font style reverts back to normal.
this type style text that you type filenames and directory names onscreen messages
italic italic variables emphasis document titles
square brackets ( [ ] ) optional items in a command For example, [ true | false ]. (Do not type the brackets.)
pipe ( | ) a choice between items in a command or parameter. When enclosed in braces ( { } ), the choice is mandatory.
UPPERCASE DMSII data set and data item names
CAUTION The Caution note indicates that there is a possibility of losing data or corrupting files. When you see a Caution note, follow the instructions carefully.
MCP server host mainframe (term) Unisys ClearPath NX, LX or A Series mainframe
DBEngine (term) Databridge Engine
DBEnterprise (term) Databridge Enterprise Server
DBServer (term) Databridge Server


The following abbreviations are used throughout this guide and are provided here for quick reference.

Abbreviation Name
AA Absolute Address
ABSN Audit Block Serial Number
AFN Audit File Number
API Application Programming Interface
DASDL Data and Structure Definition Language
DMSII Data Management System II
IDX Index
IPC Inter-Process Communications
MCP Master Control Program
RPC Remote Procedure Call
SEG Segment
WFL Work Flow Language

When using Databridge, you may need to consult the following resources.

Databridge product documentation

On the Databridge installation image, the DOCS folder contains guides for installation, error codes, and administrator's guides for each Databridge product. These documents require Adobe Reader for viewing, which you can download from the Adobe website. This documentation, and current technical notes, is also available on the Micro Focus Documentation Page.

Documentation for Databridge Enterprise Server and the Databridge Client Console is also available from the Help menu. A modern browser is required for viewing this documentation.

Unisys MCP server documentation

If you are not completely familiar with DMSII configuration, refer to your Unisys documentation.