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019  OCLC Control Number Cross-Reference (NR)

       

Input Standards

OCLC use only/OCLC use only
1st Indicator  Undefined
blank character  Undefined
2nd Indicator  Undefined
blank character  Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards 
‡a OCLC control number of deleted or merged record (R) Required if applicable/Required if applicable




Definition

The OCLC control number of duplicate records that have been deleted from WorldCat and replaced by the present record.

The system generates field 019 if a MARC record replaces two or more existing records. When MARC records are batchloaded, the system compares the MARC records to existing records. MARC records may replace existing records in the following cases:

  • If a MARC record matches one existing record, the MARC record replaces the existing record and keeps the same OCLC control number.
  • If a MARC record matches two or more existing records, the MARC record replaces all of the matching records and keeps the lowest OCLC control number. The system adds field 019 to that record, showing the OCLC control number of other replaced records.

The system generates field 019 when OCLC staff merge records in WorldCat. Processing includes merging symbols of holding libraries into the retained record, deleting the duplicate records and transferring data.

1st Indicator

Undefined. The 1st indicator position is undefined and contains a blank ( blank character ).
 
blank character Undefined 

2nd Indicator

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

Subfields

 
‡a OCLC control number of deleted or merged record   The OCLC control number of duplicate records that have been deleted from WorldCat and replaced by the present record.

Printing

Field 019 does not print.

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