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 Bibliographic 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

Subject Access

Main Entries

Added Entries

Titles

Linking Entries

Edition, Imprint, Etc.

Series Added Entries

Physical Description, Etc.

Holdings, Alternate Graphics, Etc.

Series Statements

Locally Defined Fields

Notes

 

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

Directory

Variable Control Fields:

001  Control Number  (NR)

002  unassigned

003  Control Number Identifier  (NR)

004  unassigned

005  Date and Time of Latest Transaction  (NR)

006  Fixed-Length Data Elements - Additional Material Characteristics  (R)

007  Physical Description Fixed Field  (R)

008  Fixed-Length Data Elements  (NR)

009  Cartographic Material - Physical Description Fixed Field (Detailed) (CM)  [obsolete]  [CAN/MARC only]

009  Physical Description Fixed-Field for Archival Collection (VM)  [obsolete]  Currently reserved for local use.

Variable Data Fields:

Numbers and Codes:

010  Library of Congress Control Number  (NR)

011  Linking Library of Congress Control Number  [obsolete]  [USMARC only]

012  unassigned

013  Patent Control Information  (R)

014  unassigned

015  National Bibliography Number  (R)

016  National Bibliographic Agency Control Number  (R)

017  Copyright or Legal Deposit Number  (R)

018  Copyright Article-Fee Code  (NR)

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  Overseas Acquisition Number  (R)

026  Fingerprint Identifier  (R)

027  Standard Technical Report Number  (R)

028  Publisher or Distributor Number  (R)

029  unassigned

030  CODEN Designation  (R)

031  Musical Incipits Information  (R)

032  Postal Registration Number  (R)

033  Date/Time and Place of an Event  (R)

034  Coded Cartographic Mathematical Data  (R)

035  System Control Number  (R)

036  Original Study Number for Computer Data Files  (NR)

037  Source of Acquisition  (R)

038  Record Content Licensor  (NR)

039  Level of Bibliographic Control and Coding Detail  [obsolete]

040  Cataloging Source  (NR)

041  Language Code  (R)

042  Authentication Code  (NR)

043  Geographic Area Code  (NR)

044  Country of Publishing/Producing Entity Code  (NR)

045  Time Period of Content  (NR)

046  Special Coded Dates  (R)

047  Form of Musical Composition Code  (R)

048  Number of Musical Instruments or Voices Code  (R)

049  Local Holdings  (NR)

050  Library of Congress Call Number  (R)

051  Library of Congress Copy, Issue, Offprint Statement  (R)

052  Geographic Classification  (R)

053  unassigned

054  unassigned

055  Classification Numbers Assigned in Canada  (R)

056 - 059  unassigned

060  National Library of Medicine Call Number  (R)

061  National Library of Medicine Copy Statement  (R)

062 - 065  unassigned

066  Character Sets Present  (NR)

067 - 069  unassigned

070  National Agricultural Library Call Number  (R)

071  National Agricultural Library Copy Statement  (R)

072  Subject Category Code  (R)

073  unassigned

074  GPO Item Number  (R)

075 - 079  unassigned

080  Universal Decimal Classification Number  (R)

081  unassigned

082  Dewey Decimal Classification Number  (R)

083  Additional Dewey Decimal Classification Number  (R)

084  Other Classification Number  (R)

085  Synthesized Classification Number Components  (R)

086  Government Document Classification Number  (R)

087  Report Number  [obsolete]  [CAN/MARC only]

088  Report Number  (R)

089  unassigned

090-099  Local Call Numbers

Main Entries:

100  Main Entry - Personal Name  (NR)

101- 109  unassigned

110  Main Entry - Corporate Name  (NR)

111  Main Entry - Meeting Name  (NR)

112 - 129  unassigned

130  Main Entry - Uniform Title  (NR)

131 - 199  unassigned

Titles:

200 - 209  unassigned

210  Abbreviated Title  (R)

211  Acronym or Shortened Title  [obsolete]

212  Variant Access Title  [obsolete]

213  unassigned

214  Augmented Title  [obsolete]

215 - 221  unassigned

222  Key Title  (R)

223 - 239  unassigned

240  Uniform Title  (NR)

241  Romanized Title  [obsolete]

242  Translation of Title by Cataloging Agency  (R)

243  Collective Uniform Title  (NR)

244  unassigned

245  Title Statement  (NR)

246  Varying Form of Title  (R)

247  Former Title  (R)

248  unassigned

249  unassigned

Edition, Imprint, Etc.:

250  Edition Statement  (R)

251 - 253  unassigned

254  Musical Presentation Statement  (NR)

255  Cartographic Mathematical Data  (R)

256  Computer File Characteristics  (NR)

257  Country of Producing Entity  (R)

258  Philatelic Issue Data  (R)

259  unassigned

260  Publication, Distribution, Etc. (Imprint)  (R)

261  Imprint Statement for Films (Pre-AACR 1 Revised)  (NR)  (USA only)

262  Imprint Statement for Sound Recordings (Pre-AACR 2)  (NR)  (USA only)

263  Projected Publication Date  (NR)

264  Production, Publication, Distribution, Manufacture, and Copyright Notice  (R)

265  Source for Acquisition/Subscription Address  [obsolete]

266 - 269  unassigned

270  Address  (R)

271 - 299  unassigned

Physical Description, Etc.:

300  Physical Description  (R)

301  Physical Description for Films (Pre-AACR 2)  [obsolete]  [USMARC only]

302  Page Count  [obsolete]

303  Unit Count  [obsolete]  [USMARC only]

304  Linear Footage  [obsolete]  [USMARC only]

305  Physical Description for Sound Recordings (Pre-AACR 2)  [obsolete]

306  Playing Time  (NR)

307  Hours, Etc.  (R)

308  Physical Description for Films (Archival)  [obsolete]

309  unassigned

310  Current Publication Frequency  (NR)

311 - 314  unassigned

315  Frequency  [obsolete]

316 - 320  unassigned

321  Former Publication Frequency  (R)

322 - 335  unassigned

336  Content Type  (R)

337  Media Type  (R)

338  Carrier Type  (R)

339  unassigned

340  Physical Medium  (R)

341  unassigned

342  Geospatial Reference Data  (R)

343  Planar Coordinate Data  (R)

344  Sound Characteristics  (R)

345  Projection Characteristics of Moving Image  (R)

346  Video Characteristics  (R)

347  Digital File Characteristics  (R)

348  Format of Notated Music  (R)

349  unassigned

350  Price  [obsolete]

351  Organization and Arrangement of Materials  (R)

352  Digital Graphic Representation  (R)

353  unassigned

354  unassigned

355  Security Classification Control  (R)

356  unassigned

357  Originator Dissemination Control  (NR)

358  unassigned

359  Rental Price  [obsolete]

360  unassigned

361  unassigned

362  Dates of Publication and/or Sequential Designation  (R)

363  Normalized Date and Sequential Designation  (R)

364  unassigned

365  Trade Price  (R)

366  Trade Availability Information  (R)

367 - 369  unassigned

370  Associated Place  (R)

371 - 376  unassigned

377  Associated Language  (R)

378 - 379  unassigned

380  Form of Work  (R)

381  Other Distinguishing Characteristics of Work or Expression  (R)

382  Medium of Performance  (R)

383  Numeric Designation of Musical Work  (R)

384  Key  (NR)

385  Audience Characteristics  (R)

386  Creator/Contributor Characteristics  (R)

387  unassigned

388  Time Period of Creation  (R)

389 - 399  unassigned

Series Statements:

400  Series Statement/Added Entry - Personal Name  (R)  (USA only)

401 - 409  unassigned

410  Series Statement/Added Entry - Corporate Name  (R)  (USA only)

411  Series Statement/Added Entry - Meeting Name  (R)  (USA only)

412 - 439  unassigned

440  Series Statement/Added Entry - Title  [obsolete]

441 - 489  unassigned

490  Series Statement  (R)

491 - 499  unassigned

Notes:

500  General Note  (R)

501  With Note  (R)

502  Dissertation Note  (R)

503  Bibliographic History Note  [obsolete]

504  Bibliography, Etc. Note  (R)

505  Formatted Contents Note  (R)

506  Restrictions on Access Note  (R)

507  Scale Note for Graphic Material  (NR)

508  Creation/Production Credits Note  (R)

509  unassigned

510  Citation/References Note  (R)

511  Participant or Performer Note  (R)

512  Earlier or Later Volumes Separately Cataloged Note  [obsolete]

513  Type of Report and Period Covered Note  (R)

514  Data Quality Note  (NR)

515  Numbering Peculiarities Note  (R)

516  Type of Computer File or Data Note  (R)

517  Categories of Films Note (Archival)  [obsolete]

518  Date/Time and Place of an Event Note  (R)

519  unassigned

520  Summary, Etc.  (R)

521  Target Audience Note  (R)

522  Geographic Coverage Note  (R)

523  Time Period of Content Note  [obsolete]

524  Preferred Citation of Described Materials Note  (R)

525  Supplement Note  (R)

526  Study Program Information Note  (R)

527  Censorship Note  [obsolete]

528  unassigned

529  unassigned

530  Additional Physical Form Available Note  (R)

531  unassigned

532  unassigned

533  Reproduction Note  (R)

534  Original Version Note  (R)

535  Location of Originals/Duplicates Note  (R)

536  Funding Information Note  (R)

537  Source of Data Note  [obsolete]

538  System Details Note  (R)

539  unassigned

540  Terms Governing Use and Reproduction Note  (R)

541  Immediate Source of Acquisition Note  (R)

542  Information Relating to Copyright Status  (R)

543  Solicitation Information Note  [obsolete]  [USMARC only]

544  Location of Other Archival Materials Note  (R)

545  Biographical or Historical Data  (R)

546  Language Note  (R)

547  Former Title Complexity Note  (R)

548  unassigned

549  unassigned

550  Issuing Body Note  (R)

551  unassigned

552  Entity and Attribute Information Note  (R)

553 - 554  unassigned

555  Cumulative Index/Finding Aids Note  (R)

556  Information About Documentation Note  (R)

557 - 560  unassigned

561  Ownership and Custodial History  (R)

562  Copy and Version Identification Note  (R)

563  Binding Information  (R)

564  unassigned

565  Case File Characteristics Note  (R)

566  unassigned

567  Methodology Note  (R)

568  unassigned

569  unassigned

570  Editor Note  [obsolete]

571 - 579  unassigned

580  Linking Entry Complexity Note  (R)

581  Publications About Described Materials Note  (R)

582  Related Computer Files Note  [obsolete]

583  Action Note  (R)

584  Accumulation and Frequency of Use Note  (R)

585  Exhibitions Note  (R)

586  Awards Note  (R)

587  unassigned

588  Source of Description Note  (R)

589 - 589  unassigned

590-599  Local Notes  (R)

Subject Access:

600  Subject Added Entry - Personal Name  (R)

601 - 609  unassigned

610  Subject Added Entry - Corporate Name  (R)

611  Subject Added Entry - Meeting Name  (R)

612 - 629  unassigned

630  Subject Added Entry - Uniform Title  (R)

631 - 646  unassigned

647  Subject Added Entry - Named Event  (R)

648  Subject Added Entry - Chronological Term  (R)

649  unassigned

650  Subject Added Entry - Topical Term  (R)

651  Subject Added Entry - Geographic Name  (R)

652  Subject Added Entry - Reversed Geographic  [obsolete]

653  Index Term - Uncontrolled  (R)

654  Subject Added Entry - Faceted Topical Terms  (R)

655  Index Term - Genre/Form  (R)

656  Index Term - Occupation  (R)

657  Index Term - Function  (R)

658  Index Term - Curriculum Objective  (R)

659 - 661  unassigned

662  Subject Added Entry - Hierarchical Place Name  (R)

663 - 679  unassigned

680  PRECIS Descriptor String  [obsolete, 1991]  [CAN/MARC only]

681  PRECIS Subject Indicator Number (SIN)  [obsolete, 1991]  [CAN/MARC only]

682  unassigned

683  PRECIS Reference Indicator Number (RIN)  [obsolete, 1991]  [CAN/MARC only]

684 - 689  unassigned

690-699  Local Subject Access Fields  (R)

Add Entries:

700  Added Entry - Personal Name  (R)

701 - 704  unassigned

705  Added Entry - Personal Name (Performer)  [obsolete]

706 - 709  unassigned

710  Added Entry - Corporate Name  (R)

711  Added Entry - Meeting Name  (R)

712 - 714  unassigned

715  Added Entry - Corporate Name (Performing Group)  [obsolete]

716 - 719  unassigned

720  Added Entry - Uncontrolled Name  (R)

721 - 729  unassigned

730  Added Entry - Uniform Title  (R)

731 - 739  unassigned

740  Added Entry - Uncontrolled Related/Analytical Title  (R)

741 - 750  unassigned

751  Added Entry - Geographic Name  (R)

751  Geographic Name/Area Name Entry  [obsolete]  [CAN/MARC only]

752  Added Entry - Hierarchical Place Name  (R)

753  System Details Access to Computer Files  (R)

754  Added Entry - Taxonomic Identification  (R)

755  Added Entry - Physical Characteristics  [obsolete]

756 - 759  unassigned

Linking Entries:

760  Main Series Entry  (R)

761  unassigned

762  Subseries Entry  (R)

763  unassigned

764  unassigned

765  Original Language Entry  (R)

766  unassigned

767  Translation Entry  (R)

768  unassigned

769  unassigned

770  Supplement/Special Issue Entry  (R)

771  unassigned

772  Supplement Parent Entry  (R)

773  Host Item Entry  (R)

774  Constituent Unit Entry  (R)

775  Other Edition Entry  (R)

776  Additional Physical Form Entry  (R)

777  Issued With Entry  (R)

778  unassigned

779  unassigned

780  Preceding Entry  (R)

781 - 784  unassigned

785  Succeeding Entry  (R)

786  Data Source Entry  (R)

787  Other Relationship Entry  (R)

788 - 799  unassigned

Series Added Entries:

800  Series Added Entry - Personal Name  (R)

801 - 809  unassigned

810  Series Added Entry - Corporate Name  (R)

811  Series Added Entry - Meeting Name  (R)

812 - 829  unassigned

830  Series Added Entry - Uniform Title  (R)

831 - 839  unassigned

840  Series Added Entry - Title  [obsolete]

Holdings, Alternate Graphics, Etc.:

841  Holdings Coded Data Values  (NR)  Holdings Data Format

842  Textual Physical Form Designator  (NR)  Holdings Data Format

843  Reproduction Note  (R)  Holdings Data Format

844  Name of Unit  (NR)  Holdings Data Format

845  Terms Governing Use and Reproduction Note  (R)  Holdings Data Format

846 - 849  unassigned

850  Holding Institution  (R)

851  Location  [obsolete]

852  Location  (R)

853  Captions and Pattern - Basic Bibliographic Unit  (R)  Holdings Data Format

854  Captions and Pattern - Supplementary Material  (R)  Holdings Data Format

855  Captions and Pattern - Indexes  (R)  Holdings Data Format

856  Electronic Location and Access  (R)

857 - 862  unassigned

863  Enumeration and Chronology - Basic Bibliographic Unit  (R)  Holdings Data Format

864  Enumeration and Chronology - Supplementary Material  (R)  Holdings Data Format

865  Enumeration and Chronology - Indexes  (R)  Holdings Data Format

866  Textual Holdings - Basic Bibliographic Unit  (R)  Holdings Data Format

867  Textual Holdings - Supplementary Material  (R)  Holdings Data Format

868  Textual Holdings - Indexes  (R)  Holdings Data Format

869  unassigned

870  Variant Personal Name  [obsolete]

871  Variant Corporate Name  [obsolete]

872  Variant Conference or Meeting Name  [obsolete]

873  Variant Uniform Title Heading  [obsolete]

874  unassigned

875  unassigned

876  Item Information - Basic Bibliographic Unit  (R)  Holdings Data Format

877  Item Information - Supplementary Material  (R)  Holdings Data Format

878  Item Information - Indexes  (R)  Holdings Data Format

879  unassigned

880  Alternate Graphic Representation  (R)

881  unassigned

882  Replacement Record Information  (NR)

883  Machine-generated Metadata Provenance  (R)

884  Description Conversion Information  (R)

885  Matching Information  (R)

886  Foreign MARC Information Field  (R)

887  Non-MARC Information Field  (R)

888 - 899  unassigned

Locally Defined Fields:

9XX  Locally-Defined Fields

9XX  Equivalence and Cross-Reference Fields  (Canada only)

See also:

Variable Control Fields

Variable Data Fields

MARC 21 Format for Bibliographic Data:  Contents