Library of Congress >> MARC >> Bibliographic >> 01X-09X  >> 082

082 - Dewey Decimal Classification Number (R)


MARC 21 Bibliographic - full
June 2021

First Indicator Second Indicator
Type of edition
0 - Full edition
1 - Abridged edition
7 - Other edition specified in subfield $2

Source of classification number
# - No information provided
0 - Assigned by LC
4 - Assigned by agency other than LC


Subfield Codes
  • $a - Classification number (R)
  • $b - Item number (NR)
  • $m - Standard or optional designation (NR)
  • $q - Assigning agency (NR)
  • $2 - Edition information (NR)
  • $6 - Linkage (NR)
  • $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Classification number is taken from the Dewey Decimal Classification, accessed through electronic or printed versions.

Second indicator values distinguish between content assigned by the Library of Congress (LC) and content assigned by an organization other than LC.


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

First Indicator - Type of edition

Indicates the edition from which the Dewey Decimal classification is taken.

0 - Full edition

Class number was taken from the full edition.

082 04$a388/.0919$222
1 - Abridged edition

Class number was taken from the abridged edition.

082 14$a914.3$213
7 - Other edition specified in subfield $2

The edition is specified in subfield $2 (Edition information).

082 74$a839.82$25/nor/20071204$qNO-OsNB

Second Indicator - Source of classification number

Designates whether the source of the class number is the Library of Congress or another organization.

# - No information provided

No information is provided about the source of the class number.

082 0#$aC848/.5407/05$220
0 - Assigned by LC

Source of the class number is the Library of Congress.

May be used by organizations transcribing from LC copy.

082 00$a975.5/4252/00222$222
4 - Assigned by agency other than LC

Source of the class number is an organization other than the Library of Congress.

082 04$a220.47$222

SUBFIELD CODES

$a - Classification number

Classification number assigned using an edition of the Dewey Decimal Classification. The source of the classification number is the Dewey Decimal Classification, accessed through electronic or printed versions.

082 00$a355.02/17$222
082 04$a343.7306/8$a347.30368$220
[The second number is optional]

For DDC numbers for Canadian literature, an uppercase “C” is added as a prefix. For works intended for a juvenile audience, a lowercase “j” is added as a prefix. The “j” prefix is not added to DDC numbers in records for juvenile textbooks.

082 0#$aC848$220
082 0#$aj574$220
082 0#$ajC813$220

$b - Item number

Item number portion of the number. This subfield may also contain a copy (or set) number.

$m - Standard or optional designation

Designates whether the classification number contained in the field is from the standard or optional part of the schedules or tables of the scheme identified by the first indicator (Type of edition) and by subfield $2 (Edition information). The following codes are used: a (standard) and b (optional).

082 00$a345.73/0772$220$ma
082 00$a347.305772$220$mb

$q - Assigning agency

MARC organization code of the institution that assigned the classification number.

Code from: MARC Code List for Organizations.

082 04$a004$222/ger$qDE-101b

$2 - Edition information

Information on the edition from which the DDC number was assigned. If DDC numbers are assigned from more than one edition, each DDC number or range of numbers is contained in a separate 082 field. If the DDC number is assigned from a printed version, record edition number (use “23” for print-on-demand), a slash (/), the language of the edition, a slash (/), and the year of publication or printing. If a DDC number is assigned from an electronic version, record edition number (use “23” or “22” for WebDewey, as appropriate), a slash (/), the language of the edition, a slash (/), and the date on which the DDC number was assigned by the cataloger. Languages are recorded according to the three-character codes in the MARC Code List for Languages. Dates are recorded according to Representation of Dates and Times (ISO 8601) in the pattern yyyymmdd.

082 00$a792.8/2$223/eng/20190402

$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

Spacing - Lowercase "s" (for series) is separated from the number by one space.

082 00$a920.073 s$a973.3/092$aB$222

Display Constant

[ ... ] [brackets]

Square brackets enclosing a DDC number that appear on printed products are not carried in the MARC record. They may be system generated as a display constant associated with the field tag.

 
Content designated field:
082 00$a659.1 s$a659.1/57$222
Display example:
659.1 s [659.1/57] 22

Standard or optional designation - If subfield $m is present, only one subfield $a should be coded, unless the value in subfield $m applies to all numbers in repeated occurrences of subfield $a. Otherwise, the field is repeated.


CONTENT DESIGNATOR HISTORY

Indicator 1 - Type of edition
# - No edition information recorded (BK, MU, VM, SE) [OBSOLETE]

Code # (No edition information recorded) was valid 1979-1987. Records created before the definition of the first indicator in 1979 may contain a blank (#) meaning undefined in this indicator position.

2 - Abridged NST version (BK, MU, VM, SE) [OBSOLETE]

This value was made obsolete in 1989. The U.S. Library of Congress discontinued assigning class numbers from the abridged NST version to items included in New Serial Titles as of 1981.

7 - Other edition specified in subfield $2 [NEW, 2011]
Indicator 2 - Source of classification number
# - No information provided [OBSOLETE] [USMARC only, BK, CF, MU, VM, SE]

Code # (No information provided) was valid 1982-1987. Records created before the definition of the second indicator in 1982 may contain a blank (#) meaning undefined in this indicator position.

$a - Classification number
$b - DDC number-abridged NST version (SE) [OBSOLETE]
$b - Item number

Prior to 1975, the definitions of subfields $a and $b in the serials specifications were reversed: $a (DDC number-abridged NST version), $b (DDC number). This definition of subfield $b was made obsolete when the first indicator and subfield $2 were defined in 1979. The current subfield $b was defined in 1987.

$m - Standard or optional designation [NEW, 2008]
$q - Assigning agency [NEW, 2008]
$2 - Edition number [RENAMED, 2021] [REDESCRIBED, 2021]

Library of Congress >> MARC >> Bibliographic >> 01X-09X  >> 082
(06/03/2021)
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