Introduction to X-tp

UniX transaction processing (X-tp) is best described as a transaction processing monitor.

X-tp is also part of a strategy for building on-line (transaction processing, interactive) application systems and packages which are portable across a number of different computer architectures.

This document gives a general outline of X-tp as a concept, with minimal technical detail. The companion documentation "X-tp Programming Guide" describes how to use X-tp in programming terms, more as an introduction than as a reference manual - and without reference to specific implementations of X-tp.

"X-tp Reference Manual" describes the formal function CALLs from COBOL to X-tp and the standard data structures supported by X-tp. Again, this concentrates on portability and features of particular versions of X-tp are avoided as far as possible. Particular versions of X-tp have complementary documentation - e.g. "X-tp/UNIX" for UNIX (trademark of AT & T) and "X-tp/VMS" for VMS on VAX (trademarks of Digital Equipment Corporation). This level of documentation includes features that may not be portable.

Published by Zenthor Systems Ltd.,

All rights reserved. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system without written permission from Zenthor Systems Limited.

Last Revision: 27.04.2006