082 Dewey Decimal Classification Number

Field definition and scope:

Field 082 contains a classification number assigned by the Library of Congress or by other agencies from editions of the Dewey Decimal Classification schedules. The second indicator values distinguish between content assigned by the Library of Congress (LC) and content assigned by an organization other than LC.

The classification number is taken from the Dewey Decimal Classification, accessed through electronic or printed versions. Through 1997, updates were issued in DC&: Dewey Decimal Classification Additions, Notes and Decisions. The brackets enclosing a DDC number that appear on printed products are not carried in the MARC record. They may be generated based on the field tag.

The National level record requirement for this field is Optional.

Field 082 is repeatable.

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, National-level (NLR) and Minimal-level (MLR) record requirements, and designator repeatability, see table below:

Position	Description	NLR	MLR	Repeatability
Field 082	Dewey Decimal Classification Number	O	O	R
Indicator:
First	Type of edition	M
0	Full edition	A
1	Abridged edition	A
7	Other edition specified in subfield $2	A

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

Subfield code:
$a	Classification number	M	O	R
$b	Item number	A	O	NR
$m	Standard or optional designation	M	O	NR
$q	Assigning agency	O	O	NR
$2	Edition information	M	O	NR
$6	Linkage	A	O	NR
$8	Field link and sequence number	O	O	R

Input conventions:

Spacing

Display constant

Standard or optional designation

Content designator history:

First Indicator - Type of edition

Value # - 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.

Value 2 - Abridged NST version (BK MU VM SE) [obsolete]: Value 2 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.

Value 7 - Other edition specified in subfield $2 [new, 2011]

Second Indicator - Source of classification number

Value # - No information provided (BK CF MU VM SE) [obsolete] [USMARC only]: 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.

Subfields $a - Classification number

$b - DDC number - abridged NST version (SE) [obsolete]

$b - Item number [defined]

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.

Subfields $m - Standard or optional designation [new, 2008]

$q - Assigning agency [new, 2008]

Subfield $2 - Edition number [renamed, 2021] [redescribed, 2021]