What you need to know to understand this book

Within this book, reference may be made to Release 1. The function described in this book has been added since the release of CICS® Transaction Server for VSE/ESA Release 1 and can be identified within the code as 1.1.1.

If you are not an experienced programmer, and are new to REXX, you should read the guide part of this book, see page User's Guide.

The book contains two parts: a user's guide and a reference. The user's guide section will help you become familiar with REXX for CICS Transaction Server for VSE/ESA. The reference section contains the CICS Transaction Server for VSE/ESA REXX instructions, functions, and commands. The instructions, functions, and commands are listed alphabetically in their own sections. Also included are details about general concepts you need to know in order to program in REXX.

The programming language described by this book is called the REstructured eXtended eXecutor language (commonly referred to as REXX). This book also describes how the CICS Transaction Server for VSE/ESA REXX language processor (shortened, hereafter, to the language processor) processes or interprets the REstructured eXtended eXecutor language.

Prerequisites

REXX/CICS runs under CICS Transaction Server for VSE/ESA Version 1 or above. There are no other prerequisites (other than the prerequisites that CICS TS for VSE/ESA requires).