Field definition and scope:

Field 035 contains the system control number, assigned by any agency, of the holdings record or a related bibliographic record for which a separate holdings record is made.

In separate holdings records distributed by an agency, the holdings record control number is carried in field 001 (Control Number) and the control number of the related bibliographic record is carried in field 004 (Control Number for Related Bibliographic Record).  An organization receiving the holdings record may transfer the control numbers from fields 001 and 004 to field 035 and place its own holdings record number and related bibliographic record control number in fields 001 and 004.  Each valid system control number with any related canceled or invalid control numbers is contained in a separate 035 field.

See also field 010 (Library of Congress Control Number), field 014 (Linkage Number), and field 016 (National Bibliographic Agency Control Number) for control numbers assigned by specialized sources.  For interchange purposes, documentation of the structure and use of the system control number must be provided to exchange partners by the originating organization.

Field 035 is repeatable.

Guidelines for applying content designators:

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




Field 035

System Control Number






Undefined; contains a blank



Undefined; contains a blank





Subfield code:




System control number



Canceled/invalid system control number






Field link and sequence number


Input conventions:


Embedded holdings information

Related MARC fields or documents:

001  Control Number

004  Control Number for Related Bibliographic Record

010  Library of Congress Control Number

014  Linkage Number

016  National Bibliographic Agency Control Number

See also:

0XX  Number and Codes

Variable Data Fields