0xx Fields

Contents   Fixed field   Access points   0xx   1xx   2xx   3xx   4xx   5xx   6xx   7xx   8xx   9xx   Control subfields

014  Linkage Number (R) 

Record Type


Input Standards

Field (Full/Minimal)
1st Indicator  Type of linkage number
0 Holdings record number
1 Bibliographic record number
2nd Indicator  Undefined
blank character Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards (Full/Minimal)
ǂa Linkage number (NR) Mandatory/Mandatory
ǂb Source of number (NR) Mandatory/Mandatory
ǂz Canceled or invalid linkage number (R) Optional/Optional


Control number, assigned by a bibliographic network, of a separate holdings record or the 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 and the control number of the related bibliographic record is carried in field 004. 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. Fields 001 and 004 are displayed in Record Manager LHRs. In Connexion LHRs, field 001 is not displayed and field 004 is displayed as OCLC.

The originating network is identified in subfield ǂb.

1st Indicator

Type of linkage number


Holdings record number. Linkage number is the control number of separate holdings record.


Bibliographic record number. Control number is the control number of the MARC bibliographic record that is related to the separate holdings record.

2nd Indicator

Undefined. The 2nd indicator position is undefined and contains a blank.

blank character



ǂa Linkage Number

Subfield ǂa contains a control number transferred from either field 001 or field 004 of a holdings record distributed by a major bibliographic network. The type of control number is identified by the value in the 1st indicator position.

014 1   8395872 ǂb OCoLC
ǂb Source of number

Subfield ǂb contains the MARC organization code or the OCLC Symbol for the network whose control number is contained in subfield ǂa or ǂz. See MARC Code List for Organizations.

014 1   1605897 ǂb OCoLC
ǂz Canceled or invalid linkage number

Subfield ǂz contains a canceled or invalid linkage number. Each canceled or invalid linkage number is contained in a separate subfield ǂz.

014 0   0000-49030 ǂz 0000-39730 ǂb [organization code]


For more information, including content designator history, see MARC 21 Format for Holdings Data, field 014.

This page last revised: August 27, 2020