There are 999 possible MARC tags, many of which have been established by the Library of Congress as fields in the various MARC formats.  The following lists each possible tag and, where applicable, its assigned usage in the Holdings Data Format.

The Tag List groups the Variable Control Fields and Variable Data Fields.  The Variable Data Fields are subgrouped as follows:

Numbers and Codes

Note Fields

Location and Access Fields

Holdings Data Fields

Other Variable Fields

Note:  Generally, any field containing a "9" (e.g., 049, 910, etc.) is available for local use, such as local call numbers, holdings, or subject headings.  Check with your system vendor for further information.

Leader and Directory:

Leader

Directory

Variable Control Fields:

001  Control Number  (NR)

002  unassigned

003  Control Number Identifier  (NR)

004  Control Number for Related Bibliographic Record  (NR)

005  Date and Time of Latest Transaction  (NR)

006  unassigned

007  Physical Description Fixed Field  (NR)

008  Fixed-Length Data Elements  (NR)

009  unassigned

Variable Data Fields:

Numbers and Codes:

010  Library of Congress Control Number  (NR)

011 - 013  unassigned

014  Linkage Number  (R)

015  unassigned

016  National Bibliographic Agency Control Number  (R)

017  Copyright or Legal Deposit Number  (R)

018 - 019  unassigned

020  International Standard Book Number  (R)

021  unassigned

022  International Standard Serial Number  (R)

023  Standard Film Number  [deleted]

024  Other Standard Identifier  (R)

025 - 026  unassigned

027  Standard Technical Report Number  (R)

028 - 029  unassigned

030  CODEN Designation  (NR)

031 - 034  unassigned

035  System Control Number  (R)

036 - 039  unassigned

040  Record Source  (NR)

041 - 065  unassigned

066  Character Sets Present  (NR)

067 - 099  unassigned

Note Fields:

100 - 336  unassigned

337  Media Type  (R)

338  Carrier Type  (R)

339 - 346  unassigned

347  Digital File Characteristics  (R)

348 - 505  unassigned

506  Restrictions on Access Note  (R)

507 - 537  unassigned

538  System Details Note  (R)

539 - 540  unassigned

541  Immediate Source of Acquisition Note  (R)

542 - 560  unassigned

561  Ownership and Custodial History  (R)

562  Copy and Version Identification Note  (R)

563  Binding Information  (R)

564 - 582  unassigned

583  Action Note  (R)

584 - 840  unassigned

841  Holdings Coded Data Values  (NR)

842  Textual Physical Form Designator  (NR)

843  Reproduction Note  (R)

844  Name of Unit  (NR)

845  Terms Governing Use and Reproduction Note  (R)

846 - 851  unassigned

Location and Access Fields:

852  Location  (R)

856  Electronic Location and Access  (R)

Holdings Data Fields:

853  Captions and Pattern - Basic Bibliographic Unit  (R)

854  Captions and Pattern - Supplementary Material  (R)

855  Captions and Pattern - Indexes  (R)

856  See Location and Access Fields

857 - 862  unassigned

863  Enumeration and Chronology - Basic Bibliographic Unit  (R)

864  Enumeration and Chronology - Supplementary Material  (R)

865  Enumeration and Chronology - Indexes  (R)

866  Textual Holdings - Basic Bibliographic Unit  (R)

867  Textual Holdings - Supplementary Material  (R)

868  Textual Holdings - Indexes  (R)

869 - 875  unassigned

876  Item Information - Basic Bibliographic Unit  (R)

877  Item Information - Supplementary Material  (R)

878  Item Information - Indexes  (R)

879  unassigned

Other Variable Fields:

880  Alternate Graphic Representation  (R)

881 - 882  unassigned

883  Machine-generated Metadata Provenance  (R)

884  Description Conversion Information  (R)

885 - 999  unassigned

See also:

Variable Control Fields

Variable Data Fields

MARC 21 Format for Holdings Data:  Contents