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.

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 classification number.

Field 016 is repeatable.

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, and designator repeatability, see table below:




Field 016

National Bibliographic Agency Control Number






National bibliographic agency



Library and Archives Canada



Source specified in subfield $2






Undefined; contains a blank





Subfield code:




Record control number



Canceled or invalid control number






Field link and sequence number


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.

Related MARC fields or documents:

001  Control Number

MARC Code List for Organizations

See also:

0XX  Numbers and Codes

Variable Data Fields