Library of Congress >> MARC >> Bibliographic >> 01X-09X >> 016

016 - National Bibliographic Agency Control Number (R)


MARC 21 Bibliographic - Full
October 2004

First Indicator
National bibliographic agency
# - Library and Archives Canada
7 - Source specified in subfield $2

Second Indicator
Undefined
# - Undefined


Subfield Codes
$a - Record control number (NR)
$z - Canceled/invalid control number (R)
$2 - Source (NR)
$8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Unique numbers that have been assigned to a record by a national bibliographic agency other than the Library of Congress. The control number may also appear in field 001 (Control Number) in records distributed by the same national agency. This number is a record control number used in a national bibliographic agency system, rather than a number used for an entry in a national bibliography, field 015 (National Bibliography Number).

Library of Congress control numbers are recorded in field 010. An organization using the record may remove the national bibliographic agency control number from field 001 and use field 001 for its own system control number.

Record may contain field 016 with a canceled or invalid control number of a previously-distributed record. A record may be canceled because it is a duplicate record for the same item.


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

First Indicator - National bibliographic agency
Either identifies a specific national bibliographic agency as the source of the control number, or refers to a code subfield $2 (Source).
# - Library and Archives Canada
Library and Archives Canada (LAC) is the source of the national bibliographic agency control number.
016 ##$a#730032015##rev
016 ##$a#84074272XE#
7 - Source specified in subfield $2
Used when the source of the control number is indicated by a code in subfield $2. Codes from: MARC Code List for Organizations.
016 7#$a94.763966.7$2GyFmDB
[Record control number is for the Deutsche Bibliothek.]
Second Indicator - Undefined
Undefined and contains a blank (#).

SUBFIELD CODES

$a - Record control number
Valid record control number assigned by a national bibliographic agency.
016 ##$a#721234569##
016 7#$aPTBN000004618$2PoLiBN
[Record control number is for the Biblioteca Nacional, Portugal.]
$z - Canceled/invalid control number
Canceled or invalid control number assigned by a national bibliographic agency.
016 ##$a#890000298##rev$z#89000298##
$2 - Source
MARC code or the name of the organization that identifies the national bibliographic agency that was the source of the record control number recorded in field 016. Used only when the second indicator position contains value 7 (Source specified in subfield $2). See MARC Code List for Organizations for a listing of organization code sources used in MARC 21 records.
016 7#$ab9117951$zE000214460$2Uk
[Code "Uk" identifies the British Library as the source of the control numbers]
$8 - Field link and sequence number
See description of this subfield in Appendix A: Control Subfields.

STRUCTURE OF THE LAC CONTROL NUMBER

With the redefinition of field 016 in 1997, any national bibliographic agency can record its control numbers in this field. Although the structure of numbers would vary from agency to agency, extensive use of field 016 has been made by Library and Archives Canada. Their control number structure is given below.

The language code (character position 10) identifies, with a code “E” (English) or “F” (French), a bilingual item for which two separate bibliographic records, one in English, the other in French, are produced.

In January 2001, a structural change occurred to accommodate a four digit year.

Pre-Year 2001 Control Number Structure

Name of Element Number of characters Character position in field
Undefined 1 00
Year 2 01-02
Serial number 6 03-08
Check digit 1 09
Language code 1 10
Undefined 1 11
Revision indicator variable 12-n

Control Number Structure for 2001 and Beyond

Name of Element Number of characters Character position in field
Year 4 00-03
Serial number 6 04-09
Check digit 1 10
Language code 1 11
Revision indicator variable 12-n

CONTENT DESIGNATOR HISTORY

Field 016 - National Library of Canada Record Control Number [REDEFINED, 1997] [CAN/MARC only]
Both indicator positions were undefined. The defined subfield codes were $a (NLC record control number) and $z (Canceled/invalid NLC control number).

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