Library of Congress >> MARC >> Holdings >> 0XX >> 014

014 - Linkage Number (R)

MARC 21 Holdings - Full
October 2003

First Indicator
Type of linkage number
0 - Holdings record number
1 - Bibliographic record number

Second Indicator
# - Undefined

Subfield Codes
$a - Linkage number (NR)
$b - Source of number (NR)
$z - Canceled or invalid linkage number (R)
$6 - Linkage (NR)


Control number, assigned by a bibliographic network, of a separate holdings record or its related bibliographic record for which a separate holdings record is made.

In separate holdings records distributed by a network, 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 014 and place its own holdings record number and related bibliographic record control number in fields 001 and 004. The originating network is identified in subfield $b (Source of number).

See also field 010 (Library of Congress Control Number), field 016 (National Bibliographic Agency Control Number), and field 035 (System Control Number) for control numbers for related bibliographic records assigned by other sources.



First Indicator - Type of linkage number
Whether the control number contained in subfield $a (Linkage number) or $z (Canceled/invalid linkage number) is for a holdings record or for a related bibliographic record.
0 - Holdings record number
Linkage number is the control number of a separate holdings record.
1 - Bibliographic record number
Control number is the control number of the MARC bibliographic record that is related to the separate holdings record.
Second Indicator - Undefined
Undefined and contains a blank (#).


$a - Linkage number
Control number transferred from either field 001 (Control Number) or field 004 (Control Number for Related Bibliographic Record) of a holdings record distributed by a major bibliographic network. The type of control number is identified by the value in the first indicator position.
014 1#$a8395872$bOCoLC
$b - Source of number
MARC organization code for the network whose control number contained in subfield $a or $z. See Organization Code Sources for a listing of organization code sources used in MARC 21 records.
014 1#$a1605897$bOCoLC
$z - Canceled or invalid linkage number
Each canceled or invalid linkage number is contained in a separate subfield $z.
014 0#$a0000-49030$z0000-39730$b[organization code]
$6 - Linkage
See description of this subfield in Appendix A: Control Subfields.


Punctuation - Field 014 does not end with a period.
Repeatability - Each type of linkage number is recorded in a separate field 014. Subfield $z is repeatable for recording multiple canceled or invalid linkage numbers related to a valid number.
Embedded Holdings Information - When holdings information is embedded in a related MARC bibliographic record, no field 014 is input.

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