Library of Congress >> MARC >> Holdings >> 00X >> 001

001 - Control Number (NR)

MARC 21 Holdings - Full
January 2000

Indicators and Subfield Codes
No indicators or subfield codes.


System control number assigned to a separate holdings record. For interchange purposes, documentation of the structure of the control number and input conventions are provided to exchange partners by the organization initiating the interchange.

An organization receiving a separate holdings record may move the control number of the distributing system from field 001 to field 014 (Linkage Number) or to field 035 (System Control Number), and place its own control number in field 001.


System Generation - Field 001 may be system generated.
Embedded Holdings Information - When holdings information is embedded in a related MARC bibliographic record, field 001 is not input.

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