004 RELATED 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.

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 defined in UNIMARC Manual: Bibliographic Format.

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