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MARC 21 HOME >> MARC 21 Formats >> National Level Requirements--Bibliographic >> Number & Code Fields
The Library of Congress
>> Especially for Librarians and Archivists
>> Standards
National Minimal
Level Level
010 LIBRARY OF CONGRESS CONTROL NUMBER A A
$a LC control number A A
$b NUCMC control number A A
$z Canceled or invalid LC control number A A
$8 Field link and sequence number O .
013 PATENT CONTROL INFORMATION O .
$a Number A .
$b Country A .
$c Type of number A .
$d Date O .
$e Status O .
$f Party to document A .
$6 Linkage A .
$8 Field link and sequence number O .
015 NATIONAL BIBLIOGRAPHY NUMBER O .
$a National bibliography number M .
$z Canceled/Invalid national bibliography A .
number
$6 Linkage A .
$8 Field link and sequence number O .
016 NATIONAL BIBLIOGRAPHIC AGENCY CONTROL A A
NUMBER
$a Record control number A A
$z Canceled or invalid control number A A
$2 Source A A
$8 Field link and sequence number O .
017 COPYRIGHT OR LEGAL DEPOSIT NUMBER O .
$a Copyright or legal deposit number M .
$b Source (assigning agency) M .
$d Date O .
$i Display text O .
$z Canceled/Invalid Copyright of Legal A .
Deposit Number
$6 Linkage A .
$8 Field link and sequence number O .
018 COPYRIGHT ARTICLE-FEE CODE A .
$a Copyright article-fee code M .
$6 Linkage A .
$8 Field link and sequence number O .
020 INTERNATIONAL STANDARD BOOK NUMBER A A
$a International Standard Book Number A A
$c Terms of availability A A
$z Canceled or invalid ISBN A A
$6 Linkage A A
$8 Field link and sequence number O .
022 INTERNATIONAL STANDARD SERIAL NUMBER A A
$a International Standard Serial Number A A
$l ISSN-L A A
$m Canceled ISSN-L A A
$y Incorrect ISSN A A
$z Canceled ISSN A A
$2 Source A A
$6 Linkage A A
$8 Field link and sequence number O .
024 OTHER STANDARD IDENTIFIER A A
$a Standard number or code M M
$c Terms of availability A A
$d Additional codes following the standard A A
number or code
$z Canceled or invalid standard number A A
or code
$2 Source of number or code A A
$6 Linkage A A
$8 Field link and sequence number O .
025 OVERSEAS ACQUISITION NUMBER O .
$a Overseas acquisition number M .
$8 Field link and sequence number O .
026 FINGERPRINT IDENTIFIER O .
$a First and second groups of characters A .
$b Third and fourth groups of characters A .
$c Date A .
$d Number of volume or part A .
$e Unparsed fingerprint A .
$2 Source A .
$5 Institution to which field applies A .
$6 Linkage A .
$8 Field link and sequence number O .
027 STANDARD TECHNICAL REPORT NUMBER A .
$a Standard technical report number M .
$z Canceled or invalid STRN A
$6 Linkage A .
$8 Field link and sequence number O .
028 PUBLISHER NUMBER A A
$a Publisher number M M
$b Source M M
$6 Linkage A A
$8 Field link and sequence number O .
030 CODEN DESIGNATION O .
$a CODEN M .
$z Canceled or invalid CODEN O .
$6 Linkage A .
$8 Field link and sequence number O .
031 MUSICAL INCIPITS INFORMATION O .
$a Number of work A .
$b Number of movement A .
$c Number of excerpt A .
$d Caption or heading O .
$e Role O .
$g Clef O .
$m Voice/instrument O .
$n Key signature O .
$o Time signature O .
$p Musical notation O .
$q General note O .
$r Key or mode O .
$s Coded validity note O .
$t Text incipit A .
$u Uniform Resource Identifie O .
$y Link text O .
$z Public note O .
$2 System code O .
$6 Linkage A .
$8 Field link and sequence number O .
032 POSTAL REGISTRATION NUMBER O .
$a Postal registration number M .
$b Source (agency assigning number) M .
$6 Linkage A .
$8 Field link and sequence number O .
033 DATE/TIME AND PLACE OF AN EVENT O .
$a Formatted date/time A .
$b Geographic classification area code A .
$c Geographic classification subarea code A .
$p Place of event A .
$0 Record control number 0 .
$3 Materials specified O .
$6 Linkage A .
$8 Field link and sequence number O .
034 CODED CARTOGRAPHIC MATHEMATICAL DATA A A
$a Category of scale M M
$b Constant ratio linear horizontal code A A
$c Constant ratio linear vertical scale A A
$d Coordinates westernmost longitude A .
$e Coordinates easternmost longitude A .
$f Coordinates northernmost latitude A .
$g Coordinates southernmost latitude A .
$h Angular scale A .
$j Declination northern limit A .
$k Declination southern limit A .
$m Right ascension eastern limit A .
$n Right ascension western limit A .
$p Equinox A .
$r Distance from earth A .
$s G-ring latitude A .
$t G-ring longitude A .
$x Beginning date A .
$y Ending date A .
$z Name of extraterrestrial body A .
$2 Source A .
$6 Linkage A A
$8 Field link and sequence number O .
035 SYSTEM CONTROL NUMBER O .
$a System control number M .
$z Canceled/invalid system control number A .
$6 Linkage A .
$8 Field link and sequence number O .
036 ORIGINAL STUDY NUMBER FOR COMPUTER DATA O .
FILES
$a Original study number M .
$b Source (agency assigning number) A
$6 Linkage A .
$8 Field link and sequence number O .
037 SOURCE OF ACQUISITION O .
$a Stock number A .
$b Source of stock number/acquisition M .
$c Terms of availability O .
$f Form of issue O .
$g Additional format characteristics O .
$n Note O .
$6 Linkage A .
$8 Field link and sequence number O .
038 RECORD CONTENT LICENSOR O .
$a Record content licensor M .
$6 Linkage A .
$8 Field link and sequence number O .
040 CATALOGING SOURCE M M
$a Original cataloging agency A A
$b Language of cataloging A A
$c Transcribing agency M M
$d Modifying agency A A
$e Description conventions O .
$6 Linkage A A
$8 Field link and sequence number O .
041 LANGUAGE CODE A .
$a Language code of text/sound track M .
separate title
[Subfield is A for computer files, music
and visual materials.]
$b Language code of summary or abstract A .
$d Language code of sung or spoken text A .
$e Language code of librettos A .
$f Language code of table of contents O .
$g Language code of accompanying A .
material other than librettos
$h Language code of original A .
$j Language code of subtitles or captions A .
$6 Linkage A .
$8 Field link and sequence number O .
042 AUTHENTICATION CODE A A
$a Authentication code M M
043 GEOGRAPHIC AREA CODE A .
$a Geographic area code M .
$b Local GAC code O .
$2 Source of local code A .
$6 Linkage A .
$8 Field link and sequence number O .
044 COUNTRY OF PUBLISHING/PRODUCING ENTITY CODE O .
[Field is A for Visual materials.]
$a MARC Country Code M .
$b Local subentity code O .
$c ISO Country Code O .
$2 Source of local subentity code A .
$6 Linkage A .
$8 Field link and sequence number O .
045 TIME PERIOD OF CONTENT O .
$a Time period code A .
$b Formatted 9999 B.C. through C.E time period A .
$c Formatted pre-9999 B.C. time period A .
$6 Linkage A .
$8 Field link and sequence number O .
046 SPECIAL CODED DATES O .
$a Type of date code A .
$b Date 1 (B.C. date) A .
$c Date 1 (C.E. date) A .
$d Date 2 (B.C. date) A .
$e Date 2 (C.E. date) A .
$j Date resource modified A .
$k Beginning or single date created A .
$l Ending date created A .
$m Beginning of date valid A .
$n End of date valid A .
$2 Source of date A .
$6 Linkage A .
$8 Field link and sequence number O .
047 FORM OF MUSICAL COMPOSITION CODE O .
$a Form of musical composition code M .
$2 Source of code A .
$8 Field link and sequence number O .
048 NUMBER OF MUSICAL INSTRUMENTS OR VOICES O .
CODE
$a Performer or ensemble A .
$b Soloist A .
$2 Source of code A .
$8 Field link and sequence number O .
050 LIBRARY OF CONGRESS CALL NUMBER O .
$a Classification number M .
$b Item number A .
$3 Materials specified O .
$6 Linkage A .
$8 Field link and sequence number O .
051 LIBRARY OF CONGRESS COPY, ISSUE, OFF A .
PRINT STATEMENT
$a Classification number M .
$b Item number A .
$c Copy information O .
$8 Field link and sequence number O .
052 GEOGRAPHIC CLASSIFICATION O .
[Field is M for Maps.]
$a Geographic classification area code M .
$b Geographic classification subarea code A .
$d Populated place name O .
$2 Source of code A .
$6 Linkage A .
$8 Field link and sequence number O .
055 CALL NUMBERS/CLASS NUMBERS ASSIGNED IN CANADA O .
$a Classification number M .
$b Item number A .
$2 Source of call/class number A .
$8 Field link and sequence number O .
060 NATIONAL LIBRARY OF MEDICINE CALL NUMBER O .
$a Classification number M .
$b Item number A .
$8 Field link and sequence number O .
061 NATIONAL LIBRARY OF MEDICINE COPY STATEMENT O .
$a Classification number M .
$b Item number A .
$c Copy information A .
$8 Field link and sequence number O .
066 CHARACTER SET PRESENT A A
$a Primary G0 character set O .
$b Primary G1 character set O .
$c Alternate G0 or G1 character set M M
070 NATIONAL AGRICULTURAL LIBRARY CALL NUMBER O .
$a Classification number M .
$b Item number A .
$8 Field link and sequence number O .
071 NATIONAL AGRICULTURAL LIBRARY COPY STATEMENT O .
$a Classification number M .
$b Item number A .
$c Copy information A .
$8 Field link and sequence number O .
072 SUBJECT CATEGORY CODE O .
$a Subject category code M .
$x Subject category code subdivision A .
$2 Source A .
$6 Linkage A .
$8 Field link and sequence number O .
074 GPO ITEM NUMBER O .
$a GPO item number M .
$z Canceled or invalid GPO item number A .
$8 Field link and sequence number O .
080 UNIVERSAL DECIMAL CLASSIFICATION NUMBER O .
$a Universal Decimal Classification number M .
$b Item number A .
$x Common auxiliary subdivision A .
$2 Edition identifier A .
$6 Linkage A .
$8 Field link and sequence number O .
082 DEWEY DECIMAL CALL NUMBER O .
$a Classification number M .
$b Item number A .
$m Standard or Optional Designation M .
$q Assigning agency O .
$2 Edition number M .
$6 Linkage A .
$8 Field link and sequence number O .
083 ADDITIONAL DEWEY DECIMAL CALL NUMBER O .
$a Classification number M .
$c Classification number--ending number of span A .
$m Standard or Optional Designation M .
$q Assigning agency O .
$y Table sequence number for internal A .
subarrangement or add table
$2 Edition number M .
$6 Linkage A .
$8 Field link and sequence number O .
084 OTHER CALL NUMBER A .
$a Classification number M .
$b Item number A .
$2 Source of number A .
$6 Linkage A .
$8 Field link and sequence number O .
085 SYNTHESIZED CLASIFICATION NUMBER COMPONENTS A .
$a Number where instructions are found--single O .
number or beginning number of span
$b Base number A .
$c Classification number--ending number of span A .
$f Facet designator A .
$r Root number A .
$s Classification number A .
$t Classification number--ending number of span A .
$u Standard or Optional Designation O .
$v Assigning agency A .
$w Table sequence number for internal A .
$y Table sequence number for internal A .
subarrangement or add table
$z Table identification A .
$6 Linkage O .
$8 Field link and sequence number O .
086 GOVERNMENT DOCUMENT CALL NUMBER A .
$a Classification number M .
$z Canceled or invalid classification number A .
$2 Number source A .
$6 Linkage A .
$8 Field link and sequence number O .
088 REPORT NUMBER A .
$a Report number M .
$z Canceled or invalid report number A .
$6 Linkage A .
$8 Field link and sequence number O .
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