Library of Congress >> MARC >> Bibliographic >> 01X-09X  >> 080

080 - Universal Decimal Classification Number (R)


MARC 21 Bibliographic - full
May 2017

First Indicator Second Indicator
Type of edition
# - No information provided
0 - Full
1 - Abridged

Undefined
# - Undefined


Subfield Codes
  • $a - Universal Decimal Classification number (NR)
  • $b - Item number (NR)
  • $x - Common auxiliary subdivision (R)
  • $0 - Authority record control number or standard number (R)
  • $2 - Edition identifier (NR)
  • $6 - Linkage (NR)
  • $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Number taken from the Universal Decimal Classification scheme.

The Universal Decimal Classification was developed from the Dewey Decimal Classification (DDC) scheme beginning in 1895. In the intervening years, the two systems have become very different in arrangement and philosophy. The UDC may be distinguished from the DDC by its extensive expansions, especially in classes 5 and 6 (science and technology), and by its use of various symbols in addition to Arabic numbers and a single decimal point. Field 080 is repeated to record multiple UDC numbers assigned to an item.


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

First Indicator - Type of edition

Whether the classification number is from the full or the abridged edition of the classification schedules. The actual edition number is contained in subfield $2.

# - No information provided
0 - Full

Class number is from a full edition.

1 - Abridged

Class number is from an abridged edition.

Second Indicator - Undefined

Undefined and contains a blank (#).

SUBFIELD CODES

$a - Universal Decimal Classification number

080 ##$a001.81$2[edition information]
080 ##$a971.1/.2
080 ##$a631.321:631.411.3$2[edition information]

$b - Item number

Item number portion of the UDC number. An item number is a Cutter, date, term, etc. added to a classification number to distinguish one item from any other assigned the same classification number.

$x - Common auxiliary subdivision

Number that qualifies the concept represented by the main UDC number.

Common auxiliary subdivisions, such as those for form (e.g., dictionaries), are attached to a main UDC number preceded or delimited by some kind of facet indicator. Examples of commonly used subdivision delimiters are parentheses, brackets, an apostrophe, or a hyphen.

080 ##$a821.113.1$x(494)$2[edition information]
080 ##$a94$x(474)$x”19"$x(075)$2[edition information]

$0 - Authority record control number or standard number

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

$2 - Edition identifier

Edition number, date, or other textual designation of the edition of UDC used to compose the classification number.

080 ##$a82:111.852$21993
080 ##$a821.113.4-14$21998

$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.


CONTENT DESIGNATOR HISTORY

Indicator - Type of edition [NEW, 2009]
# - No information provided [NEW, 2009]
0 - Full [NEW, 2009]
1 - Abridged [NEW, 2009]

Prior to 2009, indicator 1 was undefined.

$0 - Authority record control number or standard number [NEW, 2017]

Library of Congress >> MARC >> Bibliographic >> 01X-09X  >> 080
(05/17/2017)
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