Library of Congress >> MARC >> Authority >> 01X-09X  >> 053

053 - LC Classification Number (R)


MARC 21 Authority - full
May 2017

First Indicator Second Indicator
Undefined
# - Undefined

Source of classification number
0 - Assigned by LC
4 - Assigned by agency other than LC


Subfield Codes
  • $a - Classification number element-single number or beginning number of span (NR)
  • $b - Classification number element-ending number of span (NR)
  • $c - Explanatory term (NR)
  • $0 - Authority record control number or standard number (R)
  • $5 - Institution to which field applies (R)
  • $6 - Linkage (NR)
  • $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Single LC classification number or a number span associated with a 1XX heading in an established heading record or a subdivision record. Source of the classification number is Library of Congress Classification and/or the LC Classification Additions and Changes that are maintained by the Library of Congress. The hyphen (-) between the two class numbers in a range of numbers may be generated based on the presence of both subfields $a and $b.

Classification number(s) may be qualified by a descriptive term when the heading is represented in more than one place in the LC classification schedules. Each classification number or number span associated with a heading is contained in a separate 053 field.

Organizations may conform to Library of Congress practice by applying Subject Cataloging Manual: Classification conventions.


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

First Indicator - Undefined

Contains a blank (#).

Second Indicator - Source of classification number

Whether the source of the classification number is the Library of Congress or another organization.

0 - Assigned by LC
4 - Assigned by agency other than LC

MARC code for the organization is contained in subfield $5.

053 #4$aQH198.H3$5DI

SUBFIELD CODES

$a - Classification number element-single number or beginning number of span

100 1#$aGrimes, Martha
053 #0$aPS3557.R48998
130 #0$aBook of Mormon$xAntiquities
053 #0$aBX8627
180 ##$xRhetoric
053 #0$aP301$cLinguistics

$b - Classification number element-ending number of span

Ending number of number span when the beginning number of the span is contained in subfield $a.

151 ##$aUnited States$xHistory$yRevolution, 1775-1783
053 #0$aE201$bE298

$c - Explanatory term

Descriptive term or phrase that specifies the topic of the classification number. Normally, such a phrase is used to differentiate between two or more class numbers associated with the heading. The parentheses that enclose the phrase or term may be generated for display.

150 ##$aString quartets
053 #0$aML1160$cHistory
053 #0$aMT728$cInstruction and study
110 2#$aCatholic Church$xHistory$vSources
053 #0$aBX850$bBX875$cDocuments

$0 - Authority record control number or standard number

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

$5 - Institution to which field applies

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

053 #4$aHD1694.S6$5DI

$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

Capitalization - Alphabetic characters in the classification number portion of the field are generally uppercase.

Spacing - Any spaces that are desired as part of the call number must be input.

Display Constants

- [hyphen associated with the content of subfield $b]
( ... ) [parentheses associated with the content of subfield $c]

Hyphen between the two class numbers in a number span in subfields $a and $b and parentheses that may enclose the explanatory term in subfield $c are not carried in the MARC record. They may be system generated as display constants associated with the content of subfields $b and $c, respectively.

 
Content designated field :
053 #0$aBX850$bBX875$cDocuments
Display example:
BX850-BX875 (Documents)

CONTENT DESIGNATOR HISTORY

Indicator 2 - Source of Classification Number [NEW, 1995]

Prior to 1995, field 053 was an agency-assigned field and contained only classification numbers assigned by the Library of Congress.

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

Library of Congress >> MARC >> Authority >> 01X-09X  >> 053
(05/17/2017)
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