# Introduction

Who This Document is For | What Shadow REXXTOOLS Basic Services Is
Trademarks |

## Who This Document is For

This document describes the function and use of Shadow REXXTOOLS Basic Services. Any REXX programmer, whether a novice or experienced, can benefit from using REXXTOOLS. However, at least some familiarity with the REXX programming language is required.

## What Shadow REXXTOOLS Basic Services Is

Shadow REXXTOOLS Basic Services is a collection of programming interfaces that augments the base functionality of REXX under Shadow OS/390 Web Server. REXXTOOLS contains functions, subroutines, and host command environments that provide:

- access to VSAM, sequential, and partitioned data sets.
- access to MVS/ESA and OS/390 operating system services.
- access to SMS and DFP information.
- general enhancements to REXX data conversion, string manipulation, array handling, and global variables.

© Copyright 1998 by Open Software Technologies, Inc.