
MARC Usage in WorldCat
A summary of the use of MARC fields and subfields in the WorldCat database.
Select MARC Field
- 001: Control No.
- 003: Control No. Identifier
- 006: Additional Material Characteristics
- 007: Physical Characteristics
- 008: Material Characteristics
- 009: Physical Description Fixed-Field for Archival Collection (VM) [OBSOLETE, 1985]
- 010: LC Control No.
- 012: Terminal Display
- 013: Patent Control Information
- 015: National Bibliography No.
- 016: National Bibliography 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 or Distributor 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
- 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 Statemet
- 072: Subject Category Code
- 074: GPI Item No.
- 080: UDC No.
- 082: DDC No.
- 083: Additional DDC No
- 084: Other Classification No.
- 085: Synthesized Classication Number Components
- 086: GovDoc Classification No.
- 087: Report Number [OBSOLETE, 1997]
- 088: Report No.
- 090: Local LC-type Call No.
- 092: Local Dewey Call No.
- 096: Local NLM-type Call No.
- 100: Personal Name
- 110: Corporate Name
- 111: Meeting Name
- 130: Uniform Title
- 210: Abbreviated Title
- 211: Acronym or Shortened Title [OBSOLETE, 1993]
- 212: Variant Access Title [OBSOLETE, 1993]
- 214: Augmented Title [OBSOLETE, 1993]
- 222: Key Title
- 240: Uniform Title
- 242: Translation of Title by Cataloging Agency
- 243: Collective Uniform Title
- 245: Title Statement
- 246: Varying Form of Title
- 247: Former Title
- 250: Edition Statement
- 254: Musical Presentation Statement
- 255: Cartographic Mathematical Data
- 256: Computer File Characteristics
- 257: Country of Producing Entity
- 258: Philatelic Issue Data
- 260: Publication Distribution, Etc.
- 263: Projected Publication Data
- 264: Production, Publication, Distribution, Manufacture, and Copyright Notice
- 270: Address
- 300: Physical Description
- 303: Unit Count [OBSOLETE, 1983]
- 304: Linear Footage [OBSOLETE, 1983]
- 305: Physical Description for Sound Recordings [OBSOLETE, 1993]
- 306: Playing Time
- 307: Hours, Etc.
- 308: Physical Description for Films [OBSOLETE, 1990]
- 310: Current Publication Frequency
- 315: Frequency [OBSOLETE, 1993]
- 321: Former Publication Frequency
- 336: Content Type [NEW, 2009]
- 337: Media Type [NEW, 2009]
- 338: Carrier Type [NEW, 2009]
- 340: Physical Medium
- 342: Geospatial Reference Data
- 343: Planar Coordinate Data
- 344: Sound Characteristics [NEW, 2011]
- 345: Projection Characteristics of Moving Image [NEW, 2011]
- 346: Video Characteristics [NEW, 2011]
- 347: Digital File Characteristics [NEW, 2011]
- 351: Organization and Arrangement of Materials
- 352: Digital Graphic Representation
- 355: Security Classification Control
- 362: Dates of Publication and/or Sequential Designation
- 363: Normalized Data and Sequential Designation [NEW, 2007]
- 365: Trade Price [NEW, 2003]
- 366: Trade Availability Information [NEW, 2003]
- 370: Associated Place [NEW, 2014]
- 377: Associated Language [NEW, 2011]
- 380: Form of Work [NEW, 2010]
- 381: Other Distinguishing Characteristics of Work or Expression [NEW, 2010]
- 382: Medium of Peformance [NEW, 2010]
- 383: Numeric Designation of Musical Work [NEW, 2010]
- 384: Key [NEW, 2010]
- 385: Audience Characteristics [NEW, 2013]
- 386: Creator/Contributor Characteristics [NEW, 2013]
- 388: Time Period of Creation [New, 2014]
- 400: Series Statement/Added Entry - Personal Name [US ONLY, 1999]
- 410: Series Statement/Added Entry - Corporate Name [US ONLY, 1999]
- 440: Series Statement/Added Entry-Title [OBSOLETE, 2008]
- 490: Series Data
- 500: General Note
- 501: "With"
- 502: Dissertation
- 504: Bibliography, Etc.
- 505: Formatted Contents
- 506: Restrictions on Access
- 507: Note for Graphic Material
- 508: Creation/Production Credits
- 510: Citation/References
- 511: Participant/Performer
- 513: Type of Report/Period Covered
- 514: Data Quality
- 515: Numbering Peculiarities
- 516: Type of Computer File/Data
- 518: Date/Time and Place of Event
- 520: Summary, Etc.
- 521: Target Audience
- 522: Geographic Coverage
- 523: Time Period of Content Note [OBSOLETE, 1993]
- 524: Preferred Citation
- 525: Supplement
- 526: Study Program Information
- 530: Additional Physical Form Available
- 531: Eligibility, Fees, Procedures Note
- 533: Reproduction
- 534: Original Version
- 535: Location
- 536: Funding Information
- 537: Source of Data Note [OBSOLETE, 1993]
- 538: System Details
- 539: Data Elements of Reproduction
- 540: Terms Governing Use/Reproduction
- 541: Immediate Source of Acquisition
- 542: Information Relating to Copyright Status [NEW, 2008]
- 544: Location of Other Archival Materials
- 545: Biographical/Historical
- 546: Language
- 547: Former Title Complexity
- 550: Issuing Body
- 552: Entity/Attribution Information
- 555: Cumulative Index/Finding Aids
- 556: Information About Documentation
- 561: Ownership/Custodial History
- 562: Copy/Version Identification
- 563: Binding Information [NEW, 2002]
- 565: Case File Characteristics
- 567: Methodology
- 580: Linking Entry Complexity
- 581: Publications About Described Materials
- 582: Related Computer Files Note [OBSOLETE, 1993]
- 583: Action
- 584: Accumulation and Frequency of Use
- 585: Exhibitions
- 586: Awards
- 588: Source of Description [NEW, 2009]
- 590: Local Note
- 598: Local Note
- 600: Personal Name
- 610: Corporate Name
- 611: Meeting Name
- 630: Uniform Title
- 647: Subject Added Entry -- Named Event
- 648: Subject Added Entry -- Chronological Term [NEW, 2002]
- 650: Topical Term
- 651: Geographic Name
- 653: Index Term -- Uncontrolled
- 654: Faceted Topical Terms
- 655: Index Term -- Genre Form
- 656: Index Term -- Occupation
- 657: Index Term -- Function
- 658: Index Term -- Curriculum Objective
- 662: Subject Added Entry -- Hierarchical Place Name [NEW, 2005]
- 680: PRECIS Descriptor String [OBSOLETE, 1991]
- 695: Added Class Number
- 699: Lcoal Subject Added Entry -- Uniform Title
- 700: Personal Name
- 710: Corporate Name
- 711: Meeting Name
- 720: Uncontrolled Name
- 730: Uniform Title
- 740: Uncontrolled Related/Analytical Title
- 751: Added Entry -- Geographic Name [NEW, 2007]
- 752: Hierarchical Place Name
- 753: System Details
- 754: Taxonomic Identification
- 760: Main Series
- 762: Subseries
- 765: Original Language
- 767: Translation Entry [NEW, 2009]
- 770: Supplement/Special Issue
- 772: Supplement Parent
- 773: Host Item
- 774: Constituent Unit
- 775: Other Edition
- 776: Additional Physical Form
- 777: Issued With
- 780: Preceding
- 785: Succeeding
- 786: Data Source
- 787: Other Relationship Entry
- 800: Personal Name
- 810: Corporate Name
- 811: Meeting Name
- 830: Uniform Title
- 850: Holding Institution
- 851: Physical Location [OBSOLETE, 1993]
- 856: Electronic Location/Access
- 880: Alternate Graphic Representation
- 883: Machine-generated Metadata Provenance [NEW, 2012]
- 884: Description Conversion Information [NEW, 2015]
- 885: Matching Information
- 886: Foreign MARC Information
- 887: Non-MARC Information
- 891: Publication Pattern
- 902: Local Data Element
- 917: Local Field
- 936: OCLC/CONSER Miscellaneous Data
- 938: Vendor Specific Ordering Data
- 949: Local Processing Information
- 987: Local Romanization/Conversion History
Ground Truthing the Use of MARC
"Ground truthing" is the process whereby geographic remote sensing data is checked or enhanced by on-the-ground observation and measurement. We are performing a similar function for library cataloging. Most libraries have used the MARC standard for many decades, but how? Which elements and subfields have actually been used, and more importantly, how? This work seeks to use evidence of usage, as depicted in the largest aggregation of library data in the world WorldCat to inform decisions about where we go from here.
Visualizations
Visualizations of the data are available as well.
Available Data
Snapshots currently available include:
- 1 January 2018
- 1 January 2017
- 1 January 2016
- 1 January 2015
- 1 January 2014
- 1 January 2013
Archived quarterly reports from 2013 are also available.
Key
![]() | The contents of one or more subfields is available for this tag |
![]() | OCLC MARC documentation is available |
![]() | OCLC MARC documentation is not available |
![]() | Library of Congress MARC documentation is available |
![]() | Library of Congress MARC documentation is not available |
![]() | A bar chart of the data is available |
![]() | Data is available for downloading |
MARC Usage in WorldCat is a project of OCLC Research.