010 Library of Congress Control Number (NR) (Variable Data Field)

Field definition and scope:

Field 010 contains a unique number assigned to a record by the Library of Congress (LC) or a cooperative cataloging partner contributing authority records to the National Coordinated Cataloging Operations (NACO) database.

The LC control number is carried in field 010 subfield $a and field 001 (Control Number) in records distributed by LC's Cataloging Distribution Service.

An LC record may contain field 010 with a canceled or invalid control number of a previously-distributed record. A record may be canceled because it is a duplicate of the same heading represented by another record. The structure of the canceled/invalid control number is the same as that used by LC in field 001.

The National level record requirement for this field is Mandatory if applicable.

Field 010 is NOT 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:

See: Example for this field.

Structure:

LC Control Number Structure

Input conventions:

Agency-assigned field

Punctuation

Capitalization

LC guidelines for usage:

010 Library of Congress Control Number

Related MARC field or document:

001 Control Number

See also:

0XX Numbers and Codes

Variable Data Fields