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GC33-0009-3
File No. S360/5370-29
OS
PL/I Checkout and
Optimizing Compi lers:
Program Product Language Reference Manual
Program Numbers 5734-PL 1
5734-PL2
5734-LM4
5734-LM5
(These program products are available
as composite package 5734-PL3)
IFourth Edition (July 1974)
IThis is a major revision of, and obsoletes SC33-0009-1 and
ISC33-0009-2 and Technical Newsletters SN33-6036, SN33-6098,
ISN33-6082, and SN33-6121. This edition applies to Version1,
IRelease 2, Modification 0 of the OS PL/I Checkout and
10ptimizing Compilers, and all subsequent versions, releases,
lor modifications until otherwise indicated in new editions
lor technical newsletters.
Changes are continually made to the information herein; before
using this publication in connection with the operation of
IIBM systems, consult the latest IBM System/360 and System/370
I Bibliography, Order No. GA22-6822 and associated technical
newsletters, for the editions that are applicable and current.
Requests for copies of IBM publications should be made to your
IBM representative or to the IBM branch office serving your
locality.
A fornl for readers' comments is provided at the back of this
publication. If the form has been removed, comments may be
addressed to IBM United Kingdom Laboratories Ltd.,
Publications Department, Hursley Park, Winchester, Hampshire,
Engl~Ld. Comments become the property of IBM.
eCopyright International Business Machines Corporation
11970, 1971, 1972, 1973, 1974
ii
Preface
This publication is planned for use as a Part II, "Rules and Syntactic
reference book by the PL/I programmer. It Descriptions.," provides a quick reference
is not a tutorial publication, but is to specific information. It includes less
designed for the reader who already has a information about interrelationships, but
knowledge of the language and who requires it is organized so that a particular
a source of reference rna teria 1. question can be answered quickly. Part II
is organized purely from a reference point
The publication is in two parts. Part I of view; it is not intended for sequential
contains discussions of concepts of the reading.
language. Part II contains detailed rules
and syntactic descriptions.
For example, a programmer would read
Although implementation information is chapter 5, "Statement Classification" in
included, the book is not a complete Part I for information about the
description of any implementation interactions of different statements in a
environment. In general, it contains program; but he would look in section J,
information needed to write a program