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AE-4193C-TM

April 1978

2 pages

Original

0.2MB

Document:	22.01.02 7802 DBMS-20 V5
Order Number:	AE-4193C-TM
Revision:
Pages:	2
Original Filename:	http://bitsavers.org/pdf/dec/spd/22.01.02_7802_DBMS-20_V5.pdf

OCR Text

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Software Product Description
PRODUCT NAME: DBMS-20, Version 5, Data Base Management Syst~m
DESCRIPTION:
The DECSYSTEM-20 Data Base Management System
provides software to define, access, and maintain data in the network structures of an integrated data
base. The DIGITAL DBMS-20 implementation is
based upon the CODASYL Data Base Task Group
Report of April 1971. DBMS-20 provides the following
functions:
Data Description Process:
Data structures may be established in either a hierarchical form (commonly described as trees), or networks with multi-level relationships. Relationships can
exist within files or among one or more files (areas)
with no fixed limit on the length of chains. The number of relationships in which any record may participate and the size of the record will normally be
limited only by the design constraints of the application.

Data Manipulation Process:
Data base records may be referenced through a set
of data manipulation statements from within COBOL
or FORTRAN applications programs. These statements include the ability to store, modify, and delete
fields and records that are of specific interest to an
authorized applications user. Also included are the
capabilities to insert and remove records within structural relationships. It is possible (via the data definition process) to directly access specific records by
symbolic keys or by movement through structural
relationships.
This software consists of the following:

Data Description Language (DDL) - Is used by a data base administrator to create and maintain procedure language-level descriptions of arrays, records,
areas (data files), and sets (inter-record relationships). The data base descriptions (schema/subschemas) are established and maintained by the DDL
compiler, SCHEMA.
Data Manipulation Language (DML) - Used by an
applications programmer writing in COBOL or FORTRAN to store, retrieve, modify, and delete data and
to insert or remove inter-record data relationships.
The DML comprises an extended verb set which is
added to the DECSYSTEM-20 COBOL host language
and a preprocessor for FORTRAN-20 programs. COBOL programs which include Data Manipulation Lan-

February 1978

SPD 22.1.2

guage statements are processed directly by the COBOL compiler.

Data Base Control System (DBCS) - Is a run-time
interface between a COBOL or FORTRAN program,
the description and access privilege attributes (Le. the
processed DDL information), and the DECSYSTEM-20
operating system. The DBCS exists as a specific
module within the COBOL object-time system (L1BOL)
and the FORTRAN object-time system (FOROTS).
Data Base Administrator Facilities:
DBMEND: Recovery utility which provides roll back or
roll forward of selected data base transactions.
DBINFO: Data base utility to selectively dump data
from a data base. It can also be used to generate
statistics about the data base, a DDL cross reference
listing, and other descriptive information about the
DDL program.
STATS: Component within DSCS used to obtain runtime information about each DML verb, as well as
statistics about data base reads and writes of pages.

MINIMUM HARDWARE REQUIRED:
Any valid TOPS-20 configuration with:
• A minimum of 128K words of memory.
• Mass storage with a minimum of 150 disk pages for
DBMS-20 system software and sufficient space for
data base areas.
• Magnetic tape or disk units to dump and reload
user-established data base areas.
OPTIONAL HARDWARE:
Magnetic tape units for optional failsafe and journal
files
PREREQUISITE SOFTWARE:
TOPS-20 Version 1B or later, and either DECSYSTEM-20 COBOL-68, Version 11 or later or FORTRAN20, Version 5 or later
OPTIONAL SOFTWARE:
None
TRAINING CREDITS:
None
SUPPORT CATEGORY:
A - Software Support will be provided as stated in

AE-4193C-TM

DBMS-20, Version 5

SPD 22.1.2
-2-

the Software Support Categories Addendum to this
SPD.

UPDATE POLICY:
Software Updates, if any, released by DIGITAL during
the one (1) year period following installation, will be
provided to the customer without additional charge
(includes no installation). After the first year, updates,
if any, will be made available according to then prevailing DIGITAL policies.
ORDERING INFORMATION:
All binary licensed software, including any subsequent updates, is furnished under the licensing provisions of DIGITAL's Standard Terms and Conditions of
Sale, which provide in part that the software and any
part thereof may be used on only the single CPU on
which the software is first installed, and may be
copied, in whole or in part (with the proper inclusion
of the DIGITAL copyright notice and any DIGITAL
proprietary notices on the software) only for use on
such CPU. All source licensed software is furnished
only under the terms and conditions of a separate
Software Program Sources Agreement between Purchaser and DIGITAL.

media for the product and must be specified at the
end of the order number, e.g., OT008-AM = binaries
on 9-track magnetic tape.
M

1600 bpi 9-track Magnetic Tape

Standard Options
OT008 -A- Single-use license, binaries, documentation, support services (media: M)
OT008 -U- Armed services procurement regulation
license, binaries, documentation, support services (media: M)

ADDITIONAL SERVICES:
OT008 -3- Maintenance Service (media: M)
OT008 -Z- Armed services procurement regulation
maintenance service (media: M)

The following key (M) represents the distribution

ADDENDUM
SOFTWARE SUPPORT CATEGORIES
Each software product (hereinafter 'SOFTWARE') with a designated Support Category A or B in the applicable Software Product
Description (SPD) existing at the time of order will be the current release at the time of delivery and will conform to the SPD.
DIGITAL's sole obligation shall be to correct defects (nonconformance of the SOFTWARE to the SPD) as described below. Any
SOFTWARE with a deSignated Support Category C will be furnished on an 'as is' basis.
For SOFTWARE with a deSignated Support Category A or B, DIGITAL will provide the services set forth below without additional
charge.
CATEGORY A
1. Upon notification by customer to the nearest DIGITAL office that the computer system, including all required prerequisite
hardwar'9 and software, is ready for the installation of the SOFTWARE, DIGITAL will install such SOFTWARE in any location
within the contiguous forty-eight (48) United States, the District of Columbia, or a country in which DIGITAL or a subsidiary
of DIGiTAL has a software service facility. The notification must be received by DIGITAL and the system must be ready for
installation within thirty (30) days after the delivery of the SOFTWARE to customer or DIGITAL will have no obligation to
install. Installation will consist of: (1) verification that all components of the SOFTWARE have been received by customer, (2)
loading the SOFTWARE, and (3) executing a DIGITAL sample procedure.
2. During the ninety (90) day period after installation, if the customer encounters a problem with the current unaltered release
of the SOFTWARE which DIGITAL determines to be a defect in the SOFTWARE, DIGITAL will provide the following remedial
service (on site where necessary): (1) if the SOFTWARE is inoperable, apply a temporary correction (TC) or make a
reasonable attempt to develop an emergency by-pass, and (2) assist the customer to prepare a Software Performance
Report (SPR) and submit it to DIGITAL.
3. During the one (1) year period following installation, if the customer encounters a problem with the SOFTWARE which his
diagnosis indicates is caused by a SOFTWARE defect, the customer may submit an SPR to DIGITAL. DIGITAL will respond
to problems reported in SPRs which are caused by defects in the current unaltered release of the SOFTWARE via the
Maintenance Periodical for the SOFTWARE, which reports SPRs received, code corrections, temporary corrections, generally
useful emergency by-passes and/or notice of the availability of corrected code. Software Updates, if any, released by
DIGITAL during the one (1) year period, will be provided to the customer on DIGITAL's standard distribution media as
specified in the applicable SPD. The customer will be charged only for the media on which such updates are provided,
unless otherwise stated in the applicable SPD, at DIGITAL's then current media prices.
CATEGORY B
During the one (1) year period following delivery, the services provided to the customer will be the same as set forth in 3 above.
CATEGORY C
SOFTWARE is provided on an 'as is' basis. Any software services, if available, will be provided at the then current charges.
DIGITAL shall have the right to make additional charges for any additional effort required to provide services resulting from
customer use of other than current unaltered release of the SOFTWARE operated in accordance with the SPD.