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050 - Library of Congress Call Number (R)


MARC 21 Bibliographic - Concise
2007

Classification or call number that is taken from Library of Congress Classification or LC Classification Additions and Changes. The brackets that customarily surround alternate class/call numbers are not carried in the MARC record; they may be generated based on the presence of repeated ‡a subfields.

Indicators
First - Existence in LC collection
# - No information provided
Used for all call numbers assigned by agencies other than the Library of Congress.
0 - Item is in LC
Other agencies should use this value when transcribing from LC cataloging copy on which the call number is neither enclosed within brackets nor preceded by a Maltese cross.
1 - Item is not in LC
Used by other agencies when transcribing from LC copy on which the call number appears in brackets or is preceded by a Maltese cross. Brackets that customarily surround call numbers for items not in LC are not carried in the MARC record; they may be generated for display.
Second - Source of call number
0 - Assigned by LC
Used when an institution is transcribing from LC cataloging copy.
4 - Assigned by agency other than LC
Subfield Codes
$a - Classification number (R)
$b - Item number (NR)
Organizations that use the Cutter-Sanborn Three-Figure Author Table may conform to Library of Congress item number practice by applying Subject Cataloging Manual: Shelflisting conventions.
$3 - Materials specified (NR)
$6 - Linkage (NR)
See description of this subfield in Appendix A: Control Subfields.
$8 - Field link and sequence number (R)
See description of this subfield in Appendix A: Control Subfields.
Examples
050 #4$aNB933.F44$bT6
050 10$aBJ1533.C4$bL49
050 00$aJK609$b.M2
050 00$aZ7164.N3$bL34 no. 9$aZ7165.R42$aHC517.R42

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