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Y2S-6606-0
Program Logic
IBM System/360 Operating System
Catalog Management
Program Number 360S-DM-50S
This manual provides detailed informa-
tion on catalog management routines. These
routines record identification of volumes
used by data sets by maintaining informa-
tion in logical records called indexes.
The functions and structures of the rou-
tines are described, as are their relation-
ships to other portions of IBM System/360
Operating System. This manual also des-
cribes the structure Of catalog data sets
that contain the indexes processed by
catalog management routines. It is intend-
ed for use by persons involved in program
maintenance, and system programmers who are
altering the program design. Program logic
information is not necessary for the use
and operation of the program; therefore,
distribution of this publication is limited
to those with the aforementioned require-
ments.
RESTRICTED DISTRIBUTION--SEE ABSTRACT
PREFACE
The information contained in this manual
is intended for programmers engaged in
maintenance of catalog management routines.
Because of the close relationship between
catalog management and other portions of
the control programs of IBM System/360
Operating System, many details in this
manual are helpful in understanding overall
system operations.
This manual is arranged in two sections.
The first describes the structure of a
catalog data set and how indexes and volume
control blocks are recorded in such a data
set. The second is the description of the
catalog management functions and the inter-
nal logic of the routines that perform the
functions.
The manual is a detailed and comprehen-
sive guide to the internal structure and
functions of the catalog management rou-
tines. It is designed to be used in
conjunction with assembly listing and, con-
sequently, does not discuss program struc-
ture at the machine instruction level.
PREREQUISITE PUBLICATIONS
IBM System/360 Operating System: Con-
cepts and Facilities, Form C28-6535
IBM System/360 Operating System: Data
Management, Form C28-6537
IBM System/360 Operating System: Intro-
duction to Control Program Logic, Pro-
gram Logic Manual, Form Z28-6605
This publication was prepared for production using an IBM computer to
update the text and to control the page and line format. Page
impressions for photo-offset printing were obtained from an IBM 1403
Printer using a special print chain.
Copies of this and other IBM publications can be obtained through IBM
Branch Offices.
A form for readers' comments appears at the back of this publication.
It may be mailed directly to 1Bt-i. Address any auuitional comments
concerning this publication to the IBM Corporation, Programming Systems
Publications, Department D58, PO Box 390, Poughkeepsie, N. Y. 12602
CONTENTS
INTRODUCTION