Library of Congress >> MARC >> Authority >> 01X-09X  >> 020

020 - International Standard Book Number (R)


MARC 21 Authority - full
September 2013

First Indicator Second Indicator
Undefined
# - Undefined

Undefined
# - Undefined


Subfield Codes
  • $a - International Standard Book Number (NR)
  • $c - Terms of availability (NR)
  • $q - Qualifying information (R)
  • $z - Canceled/invalid ISBN (R)
  • $6 - Linkage (NR)
  • $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

International Standard Book Number (ISBN), terms of availability, and any canceled/invalid ISBN copied from field 020 of a MARC bibliographic record for a multipart item that is cataloged as a set.

Inclusion of this field in the established heading record for a series provides a machine link within a system between the authority record for the series and a bibliographic record in which the heading is used as a series added entry. Each valid ISBN associated with the series is contained in a separate 020 field. The subfields in this field are defined for consistency with field 020 in the MARC 21 Format for Bibliographic Data.

International Standard Serial Number (ISSN) associated with a heading for an issue of a serial for which series-type treatment is provided is contained in field 022 (International Standard Serial Number).


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

SUBFIELD CODES

$a - International Standard Book Number

Valid ISBN. ISBN and the embedded hyphens may be generated for display.

020 ##$a9706400354
020 ##$a9788802057668

$c - Terms of availability

Price or a brief statement of availability and any paranthetical qualifying information about availability.

When field 020 in the corresponding bibliographic record contains only a subfield $c, field 020 is not included in the authority record for the series.

020 ##$a8449955289$qv. 1$c$15.00 (per vol.)

$q - Qualifying information

A brief statement of qualifying information concerning the item associated with a number being recorded in subfield $a or subfield $z.

020 ##$a0882335073$qset
020 ##$a0882335065$qv. 2$qjacket

$z - Canceled/invalid ISBN

Canceled or invalid ISBN. ISBN (invalid) and the embedded hyphens may be generated for display.

Each canceled/invalid ISBN is contained in a separate subfield $z.

020 ##$a0870686933$qv. 1$qalk. paper$z0870684302

$6 - Linkage

See description of this subfield in Appendix A: Control Subfields.

$8 - Field link and sequence number

See description of this subfield in Appendix A: Control Subfields.


INPUT CONVENTIONS

ISBN Structure - ISBN is an agency-assigned data element. ISBNs are assigned to monographic publications by designated agencies in each country participating in the program. An ISBN consists of ten or thirteen digits. The 10-digit ISBN comprises four groups separated by hyphens. (The tenth digit is a check digit used as a computer validity check; it consists of a number between 0 and 9 or an uppercase X (for the arabic numeral 10). The 13-digit ISBN comprises of five elements. Element one consists of a 3-digit EAN prefix that identifies the book industry. Element two identifies the country or language agency. Element three identifies the publisher prefix. Element four identifies the title or specific edition of a publication. Element five contains a check digit.

Procedures for validation of the ISBN by calculating the check digit and hyphenating instructions are in Information and Documentation - International Standard Book Numbering (ISBN) (ISO 2108).

Display Constants

ISBN [associated with the content of subfield $a]
ISBN (invalid) [associated with the content of subfield $z]
- - - [embedded hyphens]

ISBN is usually printed in a publication with the prefix ISBN and with each of its parts separated from the other by hyphens or spaces. The initialism ISBN, the phrase ISBN (invalid), and the embedded hyphens are not carried in the MARC record. They may be system generated as display constants associated with the content of subfields $a and $z, respectively.

 
Content designated field :
020 ##$a0870686933$qv. 1$z0870684302
Display example:
ISBN 0-87068-693-3 (v. 1) ISBN (invalid) 0-87068-430-2

CONTENT DESIGNATOR HISTORY

$q - Qualifying information [NEW, 2013]

Prior to the definition of subfield $q in 2013, qualifying information was contained in subfield $a (International Standard Book Number) and $z (Canceled/invalid ISBN).


Library of Congress >> MARC >> Authority >> 01X-09X  >> 020
(09/24/2013)
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