Codes

First indicator - Level of international interest

#  Level of international interest not designated

0  Continuing resource is of international interest; full record registered with ISSN Network

1  Continuing resource is not of international interest; abbreviated record registered with ISSN Network

Second indicator:

#  Undefined

Subfields:

a  International Standard Serial Number (NR)

l   ISSN-L (R)

m Canceled ISSN-L (R)

y  Incorrect ISSN (R)

z  Canceled ISSN (R)

2  Source (NR)

6  Linkage (NR)

8  Field link and sequence number (R)

NOTE:  See MARC 21 Format for Bibliographic Data (022 International Standard Serial Number) for code definitions not given below.

Description/Instructions

Field 022 contains the International Standard Serial Number (ISSN), a unique identification number assigned to each continuing resource title by centers of the International Standard Serial Number Network.  ISSN for Canadian serials are assigned or authenticated by ISSN Canada.  ISSN for U.S. continuing resources are assigned or authenticated by ISSN catalogers at the Library of Congress in the ISSN Publisher Liaison Section (ISSN PL) and other cataloging sections.

The ISSN consists of 8 digits.  The eighth digit is a check digit which can be used to check the transcription of the number.  The first seven digits are always arabic numerals.  The check digit may be an arabic numeral or the Roman numeral "X" (uppercase) representing the arabic numeral "10".

Field 022 is not repeatable according to CONSER practice.

Display constants

See field 222.

Editing instructions

1.   ISSN should be input as two groups of four digits each, separated by a hyphen.

022 0# 0018-5817

022 0# 0145-546X

2.   Numbers found in the Bowker Serials Bibliography, in the Bowker NST cumulation, the ISSN Register, or on the issue itself may be input by CONSER catalogers.  If two or more numbers are found, however, the lower number should be input in subfield $a and other(s) in subfield $y.  Adjustments will be made by the appropriate ISSN center upon authentication.

3.   When an ISSN is applicable to more than one record, the number should be input in each of the records (e.g., a hard copy and microform record of the same title).

First indicator - Level of international interest

This indicator is used to designate to the ISSN International Centre whether the continuing resource title is of international interest or of local or ephemeral interest only.  The International Center retains only brief records for items in the latter category.  U.S. ISSN center and ISSN Canada will attempt to code all bibliographically related continuing resources with the same indicator value.  If a continuing resource coded "1" is subsequently re-coded "0", related titles will be re-coded also.  Generally, titles coded "0" will not be re-coded "1".

#    Level of international interest not designated.

When inputting the ISSN, CONSER catalogers should always set the first indicator to this value.  U.S. ISSN center or ISSN Canada should change the code to "0" or "1" when assigning or validating an ISSN.  Records validated by U.S. ISSN center prior to the adoption of values "0" and "1"  in 1977 will not be systematically updated but will be updated as records are re-accessed.

ISSN catalogers at the Library of Congress apply the following guidelines for values "0" and "1":

0    Continuing resource is of international interest.

This value is used for all continuing resources for which ISSN PL receives ISSN requests from abstracting and indexing services or other ISSN centers.  All other continuing resources requested by ISSN PL are coded with this value unless they are within the scope defined for value "1".

1    Continuing resource is not of international interest.

This value is used for continuing resources judged to be of local or ephemeral interest unless ISSN have been requested for them by abstracting and indexing services or other ISSN centers.  ISSN PL has defined publications of local or ephemeral interest as those in which interest is likely to be limited to a certain geographic area (e.g., local newspapers) or certain span of time (e.g., calendars of events).  In any case of doubt value "0" is used.

Value "1" will be changed to value "0" if a request for an ISSN for the continuing resource is subsequently received from an abstracting and indexing service or an ISSN center.

Subfields

$a  International Standard Serial Number (ISSN).

Subfield $a contains the valid ISSN for the continuing resource.

022 0# 0376-4583

$l   ISSN-L.

Subfield $l contains a valid ISSN that links together various media versions of a continuing resource.  ISSN-L may be generated for display.

022 0# 1234-1231 $l 1234-1231

$m  Canceled ISSN-L.

Subfield $m contains a canceled ISSN-L that has been associated with the resource.  Each canceled ISSN-L is contained in a separate subfield $m.  ISSN-L (canceled) may be generated for display.

022 0# $a 1560-1560 $l 1234-1231 $m 1560-1560

$y  Incorrect ISSN.

Subfield $y is designated for any type of incorrect number, other than a canceled ISSN, that has been associated with a continuing resource.  The number varies from the one assigned by the ISSN center, and it may or may not pass the check digit routine.

ISSN catalogers at the Library of Congress use this subfield under circumstances such as the following:

1.   The publisher has printed an incorrect or invalid number on the continuing resource.

2.   An incorrect or invalid number has been printed on an LC card.

3.   An incorrect number has been distributed in subfield $a of field 022 on a MARC Distribution Service tape record.

4.   An incorrect or invalid number has been printed in the ISSN Register.

ISSN catalogers at the Library of Congress do not use this subfield when an OCLC member or CONSER member has input an incorrect or invalid number not found on the continuing resource in subfield $a of field 022.  Incorrect or invalid numbers are removed from the record.

022 0# 0046-225X $y 0046-2254

$z  Canceled ISSN.

Subfield $z is limited to a valid number that can pass the check digit routine, but is retired from use because it was erroneously assigned by an authorized agency (e.g., a duplicate assignment).  Such numbers, however, are forwarded to the ISSN International Centre for retention as a cross-reference in the Centre's files.

022 0# 0145-0808 $z 0361-7106

Use of the subfield $z in U.S. or Canadian imprints is limited to ISSN centers.  CONSER members should not enter a $z in an already authenticated record nor should they change any existing $a or $y to a $z.

$2  Source.

Subfield $2 contains a code that identifies the ISSN Center responsible for assigning and maintaining ISSNs and related data.  The code is from the ISSN National Centres code list online at www.issn.org.

$6  Linkage.

For instructions on the use of subfield $6, see field 880.

Additional instructions

1.   If a U.S. imprint has been authenticated by ISSN catalogers at the Library of Congress or a Canadian imprint has been authenticated by ISSN Canada (042 nsdp or isds/c), no changes should be made in the 022 without first consulting the appropriate authorizing (ISSN) center.

2.   If the title of a continuing resource changes, requiring a new catalog entry, but the publisher continues printing the old ISSN on the piece, a CONSER cataloger may input the old ISSN in subfield $y of field 022.  If ISSN catalogers at the Library of Congress or ISSN Canada later authenticate the new record, the new ISSN will be added to subfield $a.

3.   If a valid and an incorrect or canceled ISSN are known, subfield $a precedes subfield $y or $z.

4.   If only an incorrect or canceled ISSN is known, only subfield $y or $z is used.  Including the incorrect and canceled numbers in the record allows indexes to be built on the valid, incorrect, and canceled numbers.

022 ## $z 0027-3473

Related fields, etc.

A6, C6, 222, Appendix L

022 International Standard Serial Number  (MARC 21 Format for Bibliographic Data)

See also:

01X-09X  Numbers and Codes

Variable Data Fields

Section E.  MARC 21 Format for Serials as Applied Within CONSER

CONSER Editing Guide:  Contents