Library of Congress >> MARC >> Authority >> 01X-09X >> 050

050 - Library of Congress Call Number (R)

MARC 21 Authority - Full
October 1999
First Indicator
Undefined
# - Undefined

Second Indicator
Source of call number
0 - Assigned by LC
4 - Assigned by agency other than LC

Subfield Codes
$a - Classification number (NR)
$b - Item number (NR)
$d - Volumes/dates to which call number applies (NR)
$5 - Institution to which field applies (R)
$6 - Linkage (NR)
$8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Call/and or class number for a series when all or part of the series is classified as a collected set or with the main series (646, Series Classification Practice, subfield $a, code c or m). The classification number is taken from the Library of Congress Classification and/or the LC Classification Additions and Changes that are maintained by the Library of Congress.

May also contain the volumes/dates to which the number applies. Varying numbers for different ranges of volumes/dates within a series or different copies or sets are contained in separate 050 fields.

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

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

■ INDICATORS

First Indicator - Undefined
Undefined and contains a blank (#).
Second Indicator - Source of call number
Whether the source of the call number is the Library of Congress or another organization.
0 - Assigned by LC
4 - Assigned by agency other than LC
MARC code for the assigning organization is contained in subfield $5.
050 #4$aQH198.H3$bC66$5DI

■ SUBFIELD CODES

$a - Classification number
Source of the classification number is Library of Congress Classification and the LC Classification-Additions and Changes that are maintained by the Library of Congress.
130 #0$aMémoires et documents publiés par la Société d'histoire de la Suisse romande
050 #0$aDQ3$b.S6
$b - Item number
Organizations that use the Cutter-Sanborn Three-Figure Author Table may conform to LC item number practice by applying Subject Cataloging Manual: Shelflisting conventions.
May also contain a copy (or set) number.
111 2#$aInternational Kimberlite Conference$n(3rd :$d1982 :$cClermont-Ferrand, France).$tKimberlites
050 #0$aQE462.K5$bI59
$d - Volumes/dates to which call number applies
Statement identifying those items in the series to which the call number applies. May also contain a copy (or set) number.
Used only when the call number does not apply to all items of the series. Applies to: may be generated for display.
130 #0$aBulletin (United States. Bureau of Plant Industry)
050 #0$aQK1$b.U45$dno. 1-200, copy 1; no. 201-
$5 - Institution to which field applies
See description of this subfield in Appendix A: Control Subfields.
050 #4$aHD1694.S6$bC55$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.
050 #0$aDK274.3 1968$b.K39
050 #0$aVM341$b.M9 vol. 48
050 #0$aCS71.C323$b1977
Order - The 050 field for a current call number precedes the 050 field for an earlier call number.
Display Constant
Applies to: [associated with the content of subfield $d]
Instruction phrase such as Applies to: is not carried in the MARC record. It may be system generated as a display constant associated with the content of subfield $d.
Content designated field:
050 #0$aQK1$b.U45$dno. 1-200
Display example: 
QK1.U45 Applies to: no. 1-200

CONTENT DESIGNATOR HISTORY

Indicator 2 - Source of Call Number [NEW, 1982]
Prior to 1982, field 050 was an agency-assigned field and contained only call numbers assigned by the Library of Congress.
Library of Congress >> MARC >> Authority >> 01X-09X >> 050
(03/03/2008) 		Contact Us