X/OPEN PORTABILITY GUIDE

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The 'X/Open Portability Guide' which is published by the X/Open Company, is a more general standard than POSIX for Unix-like systems. X/Open owns the Unix trademark, and the Portability Guide specifies the requirements for systems which are intended to be a Unix system, or 'Common Application Environment' (CAE). The XPG3 and XPG4 standards, released on 1989 and 1992 respectively, define all aspects of the operating system, programming languages and protocols which compliant systems should have. The 'Single UNIX Specification' was based on the XPG4 standard.
The last version of the XPG, the 'X/Open Portability Guide Issue 4' is also known as the Common Applications Environment Specification Issue 4 (CAE4), was published in July 1992 by The Open Group.

Contents

Chapters

External links

Chapters

The XPG4 specification includes these chapters:

★ System Interfaces and Headers (XSH), Issue 4, ISBN 1-872630-47-2 , C202

★ Commands and Utilities (XCU), Issue 4, ISBN 1-872630-48-0 , C203

★ System Interface Definitions (XBD), Issue 4, ISBN 1-872630-46-4 , C204

External links

★ Solaris 2.5 Standards Conformance Guide

★ The OpenGroup, formerly known as X/Open Company

★ A History of Unix