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==004 RELATED BIBLIOGRAPHIC RECORD IDENTIFIERRelated bibliographic record identifier== ==Field definition==
This field contains an identifier of the bibliographic record for the item for which the holdings are
reported. If the identifier is the record control number of the bibliographic record to which the
holdings record is related, it is recommended that it be directly preceded by a standard designation for
the institution or system by which it was assigned, enclosed in parentheses.
==Occurrence==
Mandatory. Not repeatable.
==Indicators== In conformance with [[wikipedia:uk:ISO 2709|ISO 2709]] this field does not have indicators. ==Subfields== In conformance with [[wikipedia:uk:ISO 2709 |ISO 2709]] this field does not contain subfields. ==Notes on field contents==
There are no restrictions on the form of the related bibliographic record identifier. The application is
the same as field [[001 RECORD IDENTIFIER |001 Record identifier]] defined in [[UNIMARC для бібліографічних записів|UNIMARC Manual: Bibliographic Format]]. ==Related Fields== An agency may be using other separately identified numbers such as [[wikipedia:uk:ISBN|ISBN ]] or National Bibliography
Number as a Record Identifier.
==Examples==
''EX 1''
:'''(PTBN)345231'''
:Number of the bibliographic record to which the holdings record is related, preceded by the identifier for the ''National Library of Portugal'', in parentheses.
''EX 2''
:'''ISBN 972-565-325-4'''
''EX 3''
:'''ISSN 0374-5406'''
''EX 4''
:'''(DLC)86-13927'''
== Див. також ==