Library of Congress >> MARC >> Holdings >> 0XX >> 035

035 - System Control Number (R)

MARC 21 Holdings - Full
October 2003

First Indicator
# - Undefined

Second Indicator
# - Undefined

Subfield Codes
$a - System control number (NR)
$z - Canceled or invalid control number (R)
$6 - Linkage (NR)
$8 - Field link and sequence number (R)


Control number, assigned by any agency, of a 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.




$a - System control number
MARC code (enclosed in parentheses) of the organization originating the system control number, followed immediately by the number. See Organization Code Sources for a listing of organization code sources used in MARC 21 records.
035 ##$a(MH) MHAA08221HU011
$z - Canceled or invalid control number
Canceled or invalid system control number that is associated with the valid control number contained in subfield $a.
$6 - Linkage
See the description of this subfield in Appendix A: Control Subfields.
$8 - Field link and sequence number
See the description of this subfield in Appendix A: Control Subfields.


Structure - Structure of the system control number is determined by the documentation provided by the originating system. No space occurs between the parenthetical MARC code and the first character position of the control number. For Canadian organizations, the organization code is preceded by the letters "Ca".
Embedded Holdings Information - When holdings information is embedded in a MARC bibliographic record, no field 035 is input.

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