Guidelines for Usage: 008/10 Descriptive cataloging rules
NACO LSP Usage:
Do not use the following codes:
a - Earlier rules
b - AACR 1
z - Other
Use code n (Not applicable) in traced reference records (008/09, Kind of record, code c). LC NACO must be consulted before code n is used for special situations, such as when AACR 2 or AACR 2 compatible is not applicable.
Do not use the fill character ( | ) in this character position.
LC Usage:
LC does not currently use codes a, b, and z. Records on the file with codes a or b are changed to c (AACR 2) or d (AACR 2 compatible heading) when modified for any other reason.
LC uses code n (Not applicable) in traced reference records (008/09, code c).
LC also uses code n for special situations, such as when AACR 2 or AACR 2 compatible is not applicable to the established form of a name or title heading. Code n is also used in most subject heading records.
Library of Congress guidelines for AACR 2 compatible personal and corporate name headings are contained in Cataloging Service Bulletin, no. 18 (Fall 1982), p. 49-51, and no. 30 (Fall 1985), p. 16-17.
LC has not implemented the fill character ( | ) for this character position.
Related MARC field or document:
For more information on LC Guidelines, select:
Guidelines for Usage: NACO/LSP and LC
To return:
Use the 
key.