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007 Introduction field007table 007 Electronic Resource 007 Globe 007 Map 007 Microform 007 Motion Picture 007 Nonprojected Graphic 007 Projected Graphic 007 Remote-sensing Image 007 Sound Recording 007 Tactile Material 007 Videorecording 010 LC Control No. 012 Terminal Display 013 Patent Control Information 015 National Bibliography No. 016 National Bibliographic Agency Control No. 017 Copyright/Legal Deposit No. 018 Copyright Article-Fee Code

019 OCLC Control No. Cross-Reference

020 ISBN 022 ISSN 024 Other Standard Identifier 025 Overseas Acquisition No. 026 Fingerprint Identifier 027 STRN 028 Publisher No. 029 Other System Control No. 030 CODEN Designation 031 Musical Incipits Information 032 Postal Registration No. 033 Date/Time/Place of an Event 034 Coded Cartographic Mathematical Data 035 System Control No. 036 Original Study No. 037 Source of Acquisition 040 Cataloging Source 041 Language Code 042 Authentication Code 043 Geographic Area Code 044 Country Code 045 Time Period 046 Special Coded Dates 047 Musical Composition Code 048 Number of Instruments/Voices Code 049 Local Holdings 050-099 Introduction 050 LC Call No. 051 LC Copy, Issue, Offprint Statement 052 Geographic Classification 055 Classification No.-Canada 060 NLM Call Number 061 NLM Copy Statement 066 Character Sets 070 NAL Call No. 071 NAL Copy Statement 072 Subject Category Code 074 GPO Item No. 079 OCLC Master Record Number 080 UDC No. 082 DDC No. 084 Other Classification No. 086 GovDoc Classification No. 088 Report No. 090 Local LC-type Call No. 092 Local Dewey Call No. 096 Local NLM-type Call No. 098 Other Classification Schemes 099 Local Free-Text Call No.
 

Contents   Fixed field   0xx   1xx   2xx   3xx   4xx   5xx   6xx   7xx   8xx   9xx

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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