The UniVerse Command Processor
UniVerse is an integrated database management and application development system that runs on the UNIX and Windows platforms. Some of the more powerful features of UniVerse are the following:
The UniVerse command processor accepts statements and commands from the terminal or other sources and either processes the command itself or calls another UniVerse or system process. When you first enter the UniVerse environment, the command processor is in control of the terminal.
The command processor interprets SQL statements and UniVerse commands, performs certain substitutions on statement and command lines, and passes control to the proper process or utility. Other UniVerse processors, such as the UniVerse Editor, ProVerb, and ReVise, offer sets of commands tailored to their specific functions. UniVerse also supports a procedural language that allows you to write a program, compile it, and then execute it. In addition to its own functions, UniVerse provides easy access to the operating system.
Other UniVerse Utilities and Processors:
Using UniVerse SQL you can query and update data in UniVerse tables and files. You can use UniVerse SQL interactively and in local and remote client programs.
UniVerse SQL provides the following enhancements to the UniVerse environment:
UniVerse SQL conforms to the ANSI/ISO 1992 standard established for SQL, enhanced to take advantage of the extended relational database structure of UniVerse. In contrast to first-normal-form (1NF) databases, which can have only one value for each row and column position (or cell), UniVerse is a nonfirst-normal-form (NF2) database, which can hold multiple values in a cell. UniVerse also supports nested tables called associations, which are made up of a group of related multivalued columns in a table.
The language processors and the run machine call UniVerse utilities and processes to create and delete UniVerse files, display the system status, locate rows in tables and files, control concurrent access to columns or tables, check table size, and so on. UniVerse also calls on system processes and utilities for certain tasks. These utilities and processes are documented in UniVerse System Description and the UniVerse User Reference.
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