• MARC 21 Data Elements Not Implemented by OCLC

MARC 21 Bibliographic Data Elements not Implemented by OCLC

Last Updated: August 2013

These MARC 21 bibliographic data elements have not been implemented by OCLC. This document indicates possible OCLC action to implement them.

MARC 21 Element Name Future implementation
Non-sorting characters N/A. No plans to implement

Note: For more information, see the Control Function Codes section of the MARC 21 Specifications for Record Structure, Character Sets, and Exchange Media: Character Sets and Encoding Options: Part 1: General Character Set Issues.
Subfield ‡8 Field link and sequence number

Note: Although not implemented, there are a few instances of subfield ‡8 in WorldCat.
Under consideration
LDR/05 d - deleted No plans to implement
LDR/17 u - unknown Under consideration
LDR/17 z - not applicable No plans to implement
LDR/19 Multipart resource record level Under consideration
006 Fill character meaning "No attempt to code" Under consideration
007 Fill character meaning "No attempt to code" Under consideration
007 blank ( blank character ) is valid in several positions, but OCLC does not allow blank subfields. No plans to implement due to limitations in record editor
008 Fill character meaning "No attempt to code" Under consideration
022 ‡6 Linkage No plans to implement
033 ‡6 Linkage No plans to implement
035 ‡6 Linkage No plans to implement
038 Record content licensor No plans to implement
040 ‡6 Linkage No plans to implement
041 ‡6 Linkage No plans to implement
044 ‡6 Linkage No plans to implement
045 ‡6 Linkage No plans to implement
046 ‡6 Linkage No plans to implement
050 ‡6 Linkage No plans to implement
066 ‡a Primary G0 character set No plans to implement
066 ‡b Primary G1 character set No plans to implement
080 ‡6 Linkage No plans to implement
082 ‡6 Linkage No plans to implement
263 ‡6 Linkage No plans to implement
306 ‡6 Linkage No plans to implement
380 ‡6
Linkage Under consideration
381 ‡6
Linkage Under consideration
382 ‡6
Linkage Under consideration
383 ‡6
Linkage Under consideration
384 ‡6
Linkage Under consideration
760-787 Fill character meaning "No attempt to code" Under consideration
843 ‡5 Institution to which field applies Under consideration
843 ‡6 Linkage Under consideration
845 ‡5 Institution to which field applies Under consideration
845 ‡6 Linkage Under consideration
853 ‡n Pattern note Under consideration
853 ‡p Number of pieces per issuance Under consideration
853 ‡3 Materials specified Under consideration
854 ‡n Pattern note Under consideration
854 ‡p Number of pieces per issuance Under consideration
855 ‡n Pattern note Under consideration
855 ‡p Number of pieces per issuance Under consideration
866 2nd ind. = 7 Source specified in subfield ‡2 Under consideration
866 ‡2 Source of notation Under consideration
867 2nd ind. = 7 Source specified in subfield ‡2 Under consideration
867 ‡2 Source of notation Under consideration
868 2nd ind. = 7 Source specified in subfield ‡2 Under consideration
868 ‡2 Source of notation Under consideration
Note: ind. = indicator