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050 - LIBRARY OF CONGRESS CALL NUMBER (R)
A 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
Indicates whether the item is in the LC collections.- # - No information provided
A call number assigned by an organization other than LC.
- 0 - Item is in LC
May be used by organizations transcribing from LC copy on which the call number is neither enclosed within brackets nor preceded by a Maltese cross.
- 1 - Item is not in LC
May be used by organizations transcribing from LC copy on which the call number is enclosed within brackets or is preceded by a Maltese cross. The brackets that customarily surround call numbers for items not in LC are not carried in the MARC record; they may be generated for display.
- # - No information provided
- Second - Source of call number
A value that indicates whether the call number has been assigned by the Library of Congress or another organization.- 0 - Assigned by LC
May be used by organizations transcribing from LC copy.
- 4 - Assigned by agency other than LC
- 0 - Assigned by LC
Subfield Codes
- $a - Classification number (R)
- $b - Item number (NR)
Organizations that use the Cutter-Sanborn Three-Figure Author Table may conform to LC item number practice by applying Subject Cataloging Manual: Shelflisting procedures. - $3 - Materials specified (NR)
- $6 - Linkage (NR) See Control Subfields
- $8 - Field link and sequence number (R) See Control Subfields
Examples
050 |
#4$aNB933.F44$bT6 |
050 |
10$aBJ1533.C4$bL49 |
050 |
00$aJK609$b.M2 |
050 |
00$aZ7164.N3$bL34 no. 9 |

