010  Library of Congress Control Number (NR)

 

Contents   Fixed field   0xx   1xx   2xx   3xx   4xx   5xx   6xx   7xx   8xx   9xx
       

Input Standards

Required if applicable/Required if applicable
1st Indicator  Undefined
blank character  Undefined
2nd Indicator  Undefined
blank character  Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards
a LC control number (NR) Required if applicable/Required if applicable
b NUCMC control number (R) Required if applicable/Required if applicable
z Canceled/invalid LC control number (R) Required if applicable/Required if applicable




Definition

The LC control number and/or canceled or invalid LC control numbers. (The LC control number was previously called the LC card number.) Prior to January 2001, LC control numbers had two initial digits, a hyphen, and remaining digits. From January 2001, LC control numbers were created with four initial digits, a hyphen and the remaining digits.

Guidelines

 
 

Use the following guidelines to identify LC control numbers:

  • In 2004, changes were made to the LCCN format for editing and display in bibliographic records. Connexion displays the LCCN with no hyphen, 1-3 leading blanks in unoccupied prefix positions, and (pre-2001 LCCNs only) a trailing blank in the last position. Enter a new LCCN or edit an existing LCCN with or without leading blanks in the prefix, with or without a hyphen between the year and serial number, and with or without the trailing blank at the end of a pre-2001 LCCN.

    Example Enter Pre-2001 LCCN Enter 2001 and later LCCN Display of formatted LCCN
    No prefix 95-1234

    95-001234

    95001234
    2001-1234

    2001-001234

    2001001234
    ___95001234_

    __2001001234
    1 character prefix a99-5678

    a99-005678

    a99005678
    a2010-5678

    a2010-005678

    a2010005678
    a__99005678_

    a_2010005678
    2 character prefix sn98-5934

    sn98-005934

    sn98005934
    sn2002-5934

    sn2002-005934

    sn2002005934
    sn_98005934_

    sn_2002005934
    3 character prefix agr25-20

    agr25-000020

    agr25000020
    Not used in post-2000 LCCNs agr25000020_
    Note: The underscore (_) represents a blank space.


  • OCLC may place other numbers in field 010, such as Library and Archives Canada numbers in serial records.
  • Control numbers with prefixes such as cn, ce or cf are Canadian numbers.
  • Numbers with the prefix sf are "pseudo control numbers" entered by LC for serials represented in LC's official catalog but not assigned a regular control number.
  • Numbers with the prefix sc are "pseudo control numbers" entered by LC for serials not held by LC.
  • Numbers with the prefix sn are "pseudo control numbers" used by CONSER participants for minimal-level serial records. LC uses subfield z for sn numbers for which it has later assigned a control number.

1st Indicator

Undefined. The 1st indicator position is undefined and contains a blank ( blank character ).
 
blank character Undefined

2nd Indicator

Undefined. The 2nd indicator position is undefined and contains a blank ( blank character ).
 
blank character Undefined

Subfields

A canceled or invalid LC control number must be entered in subfield z, not subfield a. If in doubt, use subfield z.

a LC control number Assume that the control number on LC cataloging copy or in a publication is valid, unless one of the circumstances described in subfield z applies.
 

Entering older LCCNs

Library of Congress Control Numbers have changed since they were first issued in 1898. Use the following guidelines to enter pre-2001 LCCNs:

One digit preceding the hyphen. Enter 0 before such numbers. If you do not enter an initial 0, the system supplies the 0.

On LC copy Enter Display
2-8520 02-8520 or 02008520 ___02008520_


Leading zeros following the hyphen. When the hyphen is present, it is your choice whether to enter leading 0's. If do not enter them, the system supplies them. If you do not enter the hyphen, you must enter the leading 0's.

On LC copy Enter Display
74-01513 74-1513 or 74-01513 or 74001513 ___74001513_


Prefixes. Enter prefixes as lowercase letters immediately preceding the number.

On LC copy Enter Display
Agr3-1285 agr03-1285 or agr03001285 agr03001285_
E25-20 e25-20 or e25000020 e__25000020_
SA68-11761 sa68-11761 or sa68011761 sa_68011761_


Prefixes of four or more letters. The system does not accept such prefixes. However, it does accept up to three letters as a prefix. If the prefix is four or more letters, substitute equivalents as shown.

Original prefix Enter
AFLN afl
CA Dupl cad
MicA mid
Micp mie
MicpA mif
PhoM php
PhomA phq


 

Entering pre-1902 LCCNs

Before 1902, LC used various styles for card numbers. For information about pre-1902 card numbers that are not described here, contact OCLC, your OCLC regional service provider or the Library of Congress (Cataloging Distribution Service or the Cataloging Policy and Support Office).

Cards issued in 1898. Some numbers issued in 1898 lack the year or have the prefix C and no year. Enter such card numbers with the prefix c98-.

On LC copy Enter Display
398 c98-398 or c98000398 c__98000398_
C-245 c98-245 or c98000245 c__98000245_


Cards issued in 1901. Some numbers issued in 1901 have no year but have alphabetic prefixes other than C (e.g., F-3144). Others may be preceded by 1 (e.g., 1-Z-245). Enter the alphabetic prefix in lowercase letters. Enter a 1 or 01 after the prefix (The system provides a leading 0 before 1). Enter the hyphen and the rest of the number.

On LC copy Enter Display
F-3144 f01-3144 or f01003144 f__01003144_
Rc-2100 rc01-2100 or rc01002100 rc_01002100_
1-Rc-990 rc01-990 or rc01000990 rc_01000990_
D-245 d01-245 or d01000245 d__01000245_
1-Z-245 z01-245 or z01000245 z__01000245_


 

Suffixes

Suffixes printed after or below the LC card number. Do not input suffixes.

Alphabetic or phrase identifiers. Do not enter the alphabetic identifier CD or phrases such as Additions, Exception, Provisional, Cancel and Brief Cataloging.

On LC copy Enter Display
64-7345CD 64-7345 or 64007345 ___64007345_
2-10372 Additions 02-10372 or 02010372 ___02010372_


Numbers followed by single daggers or asterisks. Enter only the card number.

On LC copy Enter Display
4-26834 04-26834 or 04026834 ___04026834_
8-30156* 08-30156 or 08030156 ___08030156_


Double daggers following numbers. Enter only the number.

On LC copy Enter Display
63-29455 63-29455 or 63029455 ___63029455_


Slashes and following characters. The number may be followed by a slash and a single digit, by a second hyphen and a single digit, or by a second hyphen, an M and a single digit. Do not enter the slashes, second hyphens, or any of the characters following slashes or second hyphens.

On LC copy Enter Display
3-1444/4 03-1444 or 03001444 ___03001444_
1-6360-1 01-6360 or 01006360 ___01006360_
F-795-7 f01-795 or f01000795 f__01000795_
2-2628-M2 02-2628 or 02002628 ___02002628_


 

Revision information

Unrev'd following the number. Do not enter.

On LC copy Enter Display
CA8-3172 Unrev'd ca08-3172 or ca08003172 ca_08003172_


Revised or rev following the number to the right of the printing symbol. Do not enter.

On LC copy Enter Display
74-237323 rev 74-237323 or 74237323 ___74237323_


Revision dates. The printing symbol (located to the right of the rod hole on LC cards) may include the revision date. Do not enter.

On LC copy Enter Display
74-5491 74[r75]rev 74-5491 or 74005491 ___74005491_
F-1260 Revised [r35b2] f01-1260 or f01001260 f__01001260_


Rev followed by numbers greater than 1. Do not enter.

On LC copy Enter Display
1-1238 rev2 01-1238 or 01001238 ___01001238_
8-3612             R [r77]rev4 08-3612 or 08003612 ___08003612_
46-16977 rev2* 1 46-16977 or 46016977 ___46016977_


b NUCMC control number A valid number for the item as found in the National Union Catalog of Manuscript Collections (NUCMC). The form is prefix ms, two digits, hyphen, remaining digits: ms70-491 or ms68-2403. The NUCMC control number is entered and displays identically to LCCNs in subfield a .

Any canceled or invalid NUCMC control numbers are in subfield z . Pre-1988 records may have NUCMUC control numbers in subfield a .

z Canceled/invalid LC control number Invalid control numbers. Use also if the accuracy of the control number is in doubt. If one of the following conditions exists, the LC control number is invalid:
  • The publication is a new edition but is printed with the control number of a previous edition.
  • The item is cataloged separately but is printed with the control number of the series of which the title is a part.
  • The printed control number has an obvious typographic error (e.g., the printed number differs from the number on the LC copy), but the number is still structurally correct (e.g., a two or four digit year followed by a serial number up to six digits in length).
  • LC used the control number in a record for a different item.

OCLC also uses subfield z for the control number of the deleted national library record when it merges a national library record and a member-input record.

The British Library uses subfield z to record the LC control number if the LC control number is readily available.

Printing

Field 010 subfield a prints in the lower right corner (bottom line).
 

If a particular catalog entry requires two or more physical cards (continuation cards), the LC control number prints on the final card.

back to top