050 Library of Congress Call Number (R) (Variable Data Field)
Field 050 contains a Library of Congress (LC) 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 second indicator values distinguish between content actually assigned by the Library of Congress and content assigned by an organization other than LC. The organization is identified in subfield $5.
Field 050 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.
The 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. Organizations may conform to Library of Congress practice by applying Subject Cataloging Manual: Classification conventions.
The National level record requirement for this field is Optional.
Field 050 is repeatable .
Guidelines for applying content designators:
For indicator and subfield code definitions and examples, National level (NLR) record requirements , and designator repeatability , see table below:
Position | Description | NLR | Repeatability |
Field 050 | Library of Congress Call Number | O | R |
Indicator: | |||
First | Undefined; contains a blank | M | |
Second | M | ||
0 | A | ||
4 | A | ||
Subfield code: | |||
$a | M | NR | |
$b | A | NR | |
$d | current - O earlier - M | NR | |
$5 | A | R | |
$6 | A | NR | |
$8 | O | R |
Second Indicator - Source of Call Number [defined]: The second indicator position was defined in 1982. Prior to that change, 050 was an agency-assigned field and contained only call numbers assigned by the Library of Congress. LC records created before the definition of this indicator may contain a # (blank
) meaning undefined in this position.
050 Library of Congress Call Number
Related MARC fields or documents:
646 Series Classification Practice
880 Alternate Graphic Representation
Cutter-Sanborn Three-Figure Author Table
Library of Congress Classification
LC Classification--Additions and Changes
MARC Code List for Organizations
Subject Cataloging Manual: Classification
Subject Cataloging Manual: Shelflisting
Symbols and Interlibrary Loan Policies in Canada
See also:
