016 National Bibliographic Agency Control Number

Field definition and scope:

Field 016 contains unique numbers that have been assigned to a record by a national bibliographic agency other than the Library of Congress. (Library of Congress control numbers are recorded in field 010.) The control number may also appear in field 001 (Control Number) in records distributed by the same national agency. 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. 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).

A 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.

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

Field 016 is repeatable.

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, National-level (NLR) and Minimal-level (MLR) record requirements, and designator repeatability, see table below:

Position	Description	NLR	MLR	Repeatability
Field 016	National Bibliographic Agency Control Number	A	A	R
Indicator:
First	National bibliographic agency	M
#	Library and Archives Canada	A
7	Source specified in subfield $2	A

Second	Undefined; contains a blank	M

Subfield code:
$a	Record control number	A	A	NR
$z	Canceled or invalid record control number	A	A	R
$2	Source	A	A	NR
$8	Field link and sequence number	O	O	R

Structure:

LAC Control Number Structure (Canada)

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).

First Indicator - National bibliographic agency

Value # - Library and Archives Canada [renamed, 2004]: The first indicator value # (National Library of Canada) was renamed Library and Archives Canada to reflect change in the institution's name.