OpenVMS Command Definition, Librarian, and Message Utilities Manual

This manual provides comprehensive guidance on using three essential OpenVMS utilities: the Command Definition Utility (CDU), the Librarian Utility (LIBRARIAN), and the Message Utility (MESSAGE).

Part 1: Command Definition Utility (CDU) describes how to modify the DIGITAL Command Language (DCL). It covers creating, deleting, and changing command definitions within command tables, explaining how DCL processes commands, writing command definition files, defining syntax, values, and verbs, and processing these files. It also details the use of command language routines in programs.

Part 2: Librarian Utility (LIBRARIAN) focuses on the creation, maintenance, and access of various types of OpenVMS libraries. This includes object libraries, macro libraries, help libraries, text libraries, and shareable image libraries. It details the structure of libraries, character case of library keys, methods for saving disk space, and callable Librarian utility routines.

Part 3: Message Utility (MESSAGE) explains how to supplement standard OpenVMS system messages with user-defined messages. This section covers message format, constructing messages from message source files, compiling and linking message object modules, and utilizing message pointers for different message texts. It also describes message source file statements and directives for defining message codes and symbols.