First and Second indicators:

#  Undefined


a  Original cataloging agency (NR)

b  Language of cataloging (NR)  [LAC use only]

c  Transcribing agency (NR)

d  Modifying agency (R)

e  Description conventions (NR)

6  Linkage (NR)

8  Field link and sequence number (R)

NOTE:  See MARC 21 Format for Bibliographic Data (040 Cataloging Source) for code definitions not given below.


Field 040 may contain the following information:

the symbol of the institution that did the original cataloging;

the language of the cataloging (LAC use only in CONSER records);

the symbol of the institution inputting the cataloging;

the symbol of the institution that modified the record.

a code used for specific descriptive conventions

This field is used in conjunction with the cataloging source code, field 008/39 (Source).  For all original cataloging, the OCLC system automatically sets the symbol of the inputting institution in both subfields $a and $c.  Subfield $a should be input manually when transcribing existing cataloging.

The symbols displayed in field 040 are OCLC symbols.  OCLC, when processing records to be sent to LC, converts all OCLC symbols to NUC symbols when an appropriate NUC symbol exists.


$a  Original cataloging agency.

Subfield $a contains the MARC code or name of the organization that created the original catalog record.  The content of subfield $a may be generated based on the code input in field 008/39.  When value "#" is input to 008/39, the 040 subfield $a is set to the code of a national bibliographic agency, e.g., "DLC".  When value "c" or "d" is input, the system sets the OCLC symbol of the inputting institution in 040 subfield $a.  If value "u" is input to 008/39, subfield $a in field 040 when cataloging copy of an unknown source is being transcribed manually, the 040 will lack subfield $a.


040 ## DLC

SOURCE:  c  [Record input by Harvard, a CONSER institution]

040 ## HUL $c HUL


040 ## $c MUL

In the example immediately above, field 040 lacks a subfield $a and subfield $c contains the MARC code for the transcribing organization.  In order to pass current OCLC validation rules, the cataloger may need to add an appropriate MARC code in subfield $a and add the appropriate code to the 008/39 ("d" if the 040 subfield $a MARC code is non-CONSER, "c" if CONSER, or "#" if the record was transcribed from LC copy).


040 ## $a MUL $c MUL

A symbol was not supplied in subfield $a for records that were originally created for New Serial Titles because New Serial Titles was not a cataloging agency.  Information in the records may have been acquired from several sources.  Field 008/39 carries the code "n" for records that were created originally for New Serial Titles.

$b  Language of cataloging.

Used only by LAC for Canadian bilingual records in the CONSER database.

NOTE:  In non-CONSER records, subfield $b is input by libraries for which English is not the language of the cataloging.  The language is indicated by a three-letter language code.  (See the MARC Code List for Languages for a list of these codes.)  If subfield $b is not present in a bibliographic record, the language of descriptive cataloging is assumed to be English.

040 ## $a MUQ $b fre $c MUQ

040 ## $a MUL $b spa $c MUL

Do not confuse with the language of the item, which is recorded in the fixed-field element 008/35-37.  (See also C7.2.7. Parallel records.)

$c  Transcribing agency.

Subfield $c contains the OCLC symbol of the inputting institution.  The symbol is automatically set by the system.

$d  Modifying agency.

When a CONSER institution updates or modifies a record using the REP/UPDATE command, the system automatically sets the symbol of the CONSER institution in subfield $d.  The subfield is repeated each time a further modification is made, except when a subsequent modification is made by the institution whose symbol is in the last subfield $d.

Authentication of a record without other changes is considered a modification and generates a new subfield $d.

Use of a record for OCLC card production or to add or delete an OCLC holdings location symbol is not considered a modification and does not generate a subfield $d.

$e  Description conventions.

Subfield $e contains a code for particular descriptive conventions used when creating the record.  These description convention source codes are found in the Source Codes for Vocabularies, Rules, and Schemes.  Code "dcrb" is given in subfield $e when cataloging rare serials according to the guidelines found in Appendix C of the Descriptive Cataloging of Rare Books.  On OCLC, subfield $e is input following $a.

040 ## IUL $e dcrb $c IUL $d DLC

$6  Linkage.

For instructions on the use of subfield $6, see field 880.


Prior to the implementation of the final phase of format integration in March 1996, CONSER core records were identified in subfield $e of field 040.  Between March 1996 and May 2000, core records were indicated in subfield $a of field 039.  Field 039 is now obsolete, core level records are identified by encoding level "4", which was validated by OCLC in May 2000.

Related fields, etc.

008/39, 039, Appendix L

040 Cataloging Source  (MARC 21 Format for Bibliographic Data)

See also:

01X-09X  Numbers and Codes

Variable Data Fields

Section E.  MARC 21 Format for Serials as Applied Within CONSER

CONSER Editing Guide:  Contents