010 - Library of Congress Control Number (NR)

Indicators 1st -  Undefined 2nd -  Undefined

Subfields _a  Library of Congress Control Number (LCCN) (NR) _b  NUCMC control number (R) _z  Canceled/invalid LCCN (R) _8  Field link and sequence number (R)

Guidelines

Do NOT add punctuation at the end of the number. On January 1, 2001, the structure of the 010 field changed to accommodate a four-digit year. The new structure applies to LCCNs assigned in 2001 and forward. Previously assigned LCCNs will not be changed to the new structure. 2001 LCCN Format Prefix = 2 alphabetic characters Year = 4 numeric characters Serial number = 1-6 numeric characters 1898-2000 LCCN Format Prefix = 3 alphabetic characters Year = 2 numeric characters Serial number = 1-6 numeric characters Supplemental number = 1 character (always blank) Suffix / Revision date = Variable length (each preceded by a /) Prefixes are optional in both formats. Both the year and serial number are required in both formats and are typically separated by a hyphen (-). If the serial number is less 6 characters long, you must either enter a hyphen between the year and the serial number, or pad the serial number with one or more preceding zeros. The suffix and/or revision date in the 1898-2000 format are optional. If included each suffix and revision date must be preceded by a slash (/). If the LCCN does not include a suffix, but does include a revision date, the date should be preceded by two slashes (//).

Examples

010 ## _a2001-36783 010 ## _a##2001036783 010 ## _a###79139101#/AC/MN 010 ## _a###73002284#//r752