Library of Congress >> MARC >> Classification Field List

MARC 21 Format for Classification Data
Field List


2000 Edition
Update No. 1 (October 2001) through Update No. 18 (April 2014)

This document lists all valid and obsolete data elements that may appear in MARC 21 classification records. It is intended to meet the need for a simple data element list to support MARC system development and online validation of MARC data elements. This listing does not include any descriptions or examples of MARC data elements. Descriptions and examples can be found in the MARC 21 Format for Classification Data


--Leader and Directory--
  LEADER
   Character Positions
      00-04 - Record length
      05 - Record status
         a - Increase in encoding level
         c - Corrected or revised
         d - Deleted
         n - New
      06 - Type of record
         w - Classification data
      07-08 - Undefined character positions
      09 - Character coding scheme
         # - MARC 8
         a - UCS/Unicode
      10 - Indicator count
      11 - Subfield code length
      12-16 - Base address of data
      17 - Encoding level
         n - Complete classification record
         o - Incomplete classification record
      18-19 - Undefined character positions
      20-23 - Entry map
      20 - Length of the length-of-field portion
      21 - Length of the starting-character-position portion
      22 - Length of the implementation-defined portion
      23 - Undefined

  DIRECTORY
   Character Positions
      00-02 - Tag
      03-06 - Field length
      07-11 - Starting character position


--Control Fields (001-008)--
001 - CONTROL NUMBER (NR)

003 - CONTROL NUMBER IDENTIFIER  (NR)

005 - DATE AND TIME OF LATEST TRANSACTION  (NR)

008 - FIXED-LENGTH DATA ELEMENTS  (NR)
   Character Positions
      00-05 Date entered on file
      06 - Kind of record
         a - Schedule record
         b - Table record
         c - Index term record
      07 - Type of number
         a - Single number
         b - Defined number span
         c - Summary number span
         n - Not applicable
      08 - Classification validity
         a - Valid
         b - First number of span invalid
         c - Last number of span invalid
         d - Completely invalid
         e - Obsolete
         n - Not applicable
      09 - Standard or optional designation
         a - Standard
         b - Optional
         n - Not applicable
      10 - Record update in process
         a - Record can be used
         b - Record is being updated
      11 - Level of establishment
         a - Fully established
         c - Provisional
      12 - Synthesized number indication
         a - Not synthesized
         b - Synthesized
         n - Not applicable
      13 - Display controller
         a - Displayed in standard schedules or tables
         b - Extended display


--Numbers and Codes (01X-08X)--
010 - LIBRARY OF CONGRESS CONTROL NUMBER  (NR)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - LC control number (NR)
      $z - Canceled/invalid LC control number (R)
      $8 - Field link and sequence number (R)

016 - NATIONAL BIBLIOGRAPHIC AGENCY CONTROL NUMBER (R)
   Indicators
      First - National bibliographic agency
         # - Library and Archives Canada
         7 - Agency identified in subfield $2
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Record control number (NR)
      $z - Canceled or invalid control number (R)
      $2 - Source (NR)
      $8 - Field link and sequence number (R)

034 - CODED CARTOGRAPHIC MATHEMATICAL DATA  (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Type of ring
         # - Not applicable
         0 - Outer ring
         1 - Exclusion ring
   Subfield Codes
      $d - Coordinates - westernmost longitude (NR)
      $e - Coordinates - easternmost longitude (NR)
      $f - Coordinates - northernmost latitude (NR)
      $g - Coordinates - southernmost latitude (NR)
      $j - Declination - northern limit (NR)
      $k - Declination - southern limit (NR)
      $m - Right ascension - eastern limit (NR)
      $n - Right ascension - western limit  (NR)
      $p - Equinox  (NR)
      $r - Distance from earth  (R)
      $s - G-ring latitude (R)
      $t - G-ring longitude (R)
      $x - Beginning date  (NR)
      $y - Ending date (NR)
      $z - Name of extraterrestrial body  (NR)
      $0 - Authority record control number or standard number (R)
      $2 - Source  (NR)
      $3 - Materials specified (NR)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

035 - SYSTEM CONTROL NUMBER  (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - System control number  (NR)
      $z - Canceled/invalid control number  (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

040 - RECORD SOURCE  (NR)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Original classification agency  (NR)
      $b - Language code (NR)
      $c - Transcribing agency (NR)
      $d - Modifying agency (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

042 - AUTHENTICATION CODE (NR)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Code
      $a - Authentication code  (R)

043 - GEOGRAPHIC AREA CODE (NR)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Geographic area code (R)
      $b - Local GAC code (R)
      $c - ISO code (R)
      $0 - Authority record control number or standard number (R)
      $2 - Source of local code (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

066 - CHARACTER SETS PRESENT (NR)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Primary G0 character set (NR)
      $b - Primary G1 character set (NR)
      $c - Alternate G0 or G1 character set (R)

084 - CLASSIFICATION SCHEME AND EDITION (NR)
   Indicators
      First - Type of edition
         0 - Full
         1 - Abridged
         8 - Other
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification scheme code (NR)
      $b - Edition title (NR)
      $c - Edition identifier (NR)
      $d - Source edition identifier (NR)
      $e - Language code  (R)
      $f - Authorization (NR)
      $n - Variations (R)
      $q - Assigning agency (NR)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)


--Classification Number and Term Fields (15X)--
153 - CLASSIFICATION NUMBER  (NR)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification number--single number or beginning number of span  (R)
      $c - Classification number--ending number of span  (R)
      $e - Classification number hierarchy--single number or beginning number of span (R)
      $f - Classification number hierarchy--ending number of span (R) 
      $h - Caption hierarchy (R)
      $j - Caption  (NR)
      $k - Summary number span caption hierarchy  (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $z - Table identification  (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

154 - GENERAL EXPLANATORY INDEX TERM  (NR)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Code
      $a - General explanatory index term  (NR)
      $b - General explanatory index term--succeeding level  (R)
      $f - Schedule identification (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)


--Complex See Reference Fields (2XX)--
253 - COMPLEX SEE REFERENCE (R)
   Indicators
      First - Type of reference
         0 - See reference
         1 - Standard subdivisions do-not-use reference
         2 - Class elsewhere reference
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification number referred to--single number or beginning number of span (R)
      $c - Classification number referred to--ending number of span (R)
      $i - Explanatory text (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $y - Table identification--schedule (NR)  [OBSOLETE]
      $z - Table identification  (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)


--Complex See Also Reference Fields (3XX)--
353 - COMPLEX SEE ALSO REFERENCE  (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification number referred to--single number or beginning number of span (R)
      $c - Classification number referred to--ending number of span  (R)
      $i - Explanatory text (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $y - Table identification--schedule (NR)  [OBSOLETE]
      $z - Table identification  (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)


--Invalid Number Tracing Fields (4XX)--
453 - INVALID NUMBER TRACING  (R)
   Indicators
      First - Source of classification number
         0 - Schedule
         1 - Table
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification number element--single number or beginning number of span (R)
      $c - Classification number element--ending number of span  (R)
      $h - Caption hierarchy  (R)
      $i - Reference instruction phrase  (NR)
      $j - Caption  (NR)
      $k - Summary number span caption hierarchy (R)
      $t - Topic  (NR)
      $w - Control subfield (NR)
         0  Special relationship
         1  Hierarchical relationship
         2  Reference display 
         3  History reference
      $y - Table sequence number for internal subarrangement or add table (R)
      $y - Table identification--schedule (NR) [OBSOLETE]
      $z - Table identification  (NR)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)


--Valid Number Tracing Fields (5XX)--
553 - VALID NUMBER TRACING (R)
   Indicators
      First - Source of classification number
         0 - Schedule
         1 - Table
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification number--single number or beginning number of span (R)
      $c - Classification number--ending number of span  (R)
      $h - Caption hierarchy  (R)
      $i - Reference instruction phrase  (NR)
      $j - Caption  (NR)
      $k - Summary number span caption hierarchy  (R)
      $t - Topic  (NR)
      $w - Control subfield  (NR)
         0  Special relationship
         1  Hierarchical relationship
         2  Reference display 
         3  History reference
      $y - Table sequence number for internal subarrangement or add table (R)
      $y - Table identification--schedule (NR)  [OBSOLETE]
      $z - Table identification (NR)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)


--Note Fields (67X)--
673 - Segmented Classification Number (NR)
   Indicators
      First - Undefined
         # - Undefined 
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification number-single number or beginning number of span (R)
      $c - Classification number-ending number of span (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $z - Table identification (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (NR)

674 - Segmentation Instruction (R)
   Indicators
      First - Undefined
         # - Undefined 
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification number-single number or beginning number of span (R)
      $c - Classification number-ending number of span (R)
      $i - Explanatory text (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $z - Table identification (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (NR)

680 - SCOPE NOTE (R)
   Indicators
      First - Hierarchical force
         0 - Not applicable or no hierarchical force
         1 - Hierarchical force
         2 - Semihierarchical force
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification number--single number or beginning number of span (R)
      $c - Classification number--ending number of span (R)
      $i - Explanatory text  (R)
      $t - Topic (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $y - Table identification--schedule  (R)  [OBSOLETE]
      $z - Table identification  (R)
      $5 - Institution to which field applies 
      $6 - Linkage (NR)
      $8 - Field link and sequence number (NR)

681 - CLASSIFICATION EXAMPLE TRACING NOTE   (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification number--single number or beginning number of span (R)
      $c - Classification number--ending number of span  (R)
      $i - Explanatory text  (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $y - Table identification--schedule (R)  [OBSOLETE]
      $z - Table identification (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

683 - APPLICATION INSTRUCTION NOTE  (R)
   Indicators
      First - Type of note
         0 - General application
         1 - Special arrangement of classification topics
         2 - Optional classification
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification number--single number or beginning number of span (R)
      $c - Classification number--ending number of span  (R)
      $i - Explanatory text  (R)
      $p - Corresponding classification field  (R)
      $t - Topic (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $y - Table identification--schedule (R)  [OBSOLETE]
      $z - Table identification (R)
      $5 - Institution to which field applies  (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (NR)

684 - AUXILIARY INSTRUCTION NOTE  (R)
   Indicators
      First - Type of note
         0 - Source entry
         1 - Textual note
         2 - Reference note
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification number--single number or beginning number of span (R)
      $c - Classification number--ending number of span  (R)
      $i - Explanatory text  (R)
      $j - Caption  (NR)
      $y - Table sequence number for internal subarrangement or add table (R)
      $y - Table identification--schedule  (R)  [OBSOLETE]
      $z - Table identification  (R)
      $5 - Institution to which field applies  (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (NR)

685 - HISTORY NOTE  (R)
   Indicators
      First - Result of change
         0 - Completely new number
         1 - Completely vacated number
         2 - Partially changed number
         3 - Reused after being vacated
         4 - Immediately reused
         8 - Other
      Second - Type of history information
         0 - Relocation
         1 - Formerly
         2 - Discontinuation
         3 - Expansion
         8 -  Other
   Subfield Codes
      $a - New number--single number or beginning number of span (R)
      $b - Previous number--single number or beginning number of span (R)
      $c - Classification number--ending number of span (R)
      $d - Date of implementation of authoritative agency (NR)
      $e - Local implementation date (NR)
      $f - Title and publication date (NR)
      $i - Explanatory text (R)
      $t - Topic (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $y - Table identification--schedule (R)  [OBSOLETE]
      $z - Table identification  (R)
      $2 - Edition number  (R)
      $5 - Institution to which field applies  (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (NR)

686 - RELATIONSHIP TO SOURCE NOTE  (R)
   Indicators
      First - Type of relationship
         0 - Number from other source edition
         1 - Expansion
         2 - Option
         3 - Adaption, other
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Number in edition described in field 084--single number or
           beginning number of span (R)
      $b - Number in primary source of edition--single number or 
           beginning number of span (R)
      $c - Ending number of span (R)
      $i - Explanatory text (R)
      $o - Number where instructions are found--single number or beginning of number of span (R)
      $t - Topic (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $z - Table identification  (R)
      $2 - Edition identifier  (R)
      $5 - Institution to which field applies  (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (NR)


--Index Term Fields (70X-75X)--
700 - INDEX TERM--PERSONAL NAME (R)
   Indicators
      First - Type of personal name entry element
         0 - Forename
         1 - Surname
         2 - Multiple surname [OBSOLETE]
         3 - Family name
      Second - Thesaurus
         0 - Library of Congress Subject Headings/Name authority file
         1 - LC subject headings for children's literature
         2 - Medical Subject Headings/NLM name authority file
         3 - National Agricultural Library subject authority file
         4 - Source not specified
         5 - Canadian Subject Headings/LAC name authority file
         6 - Répertoire de vedettes-matière
         7 - Source specified in subfield $2
   Subfield Codes
      $a - Personal name (NR)
      $b - Numeration (NR)
      $c - Titles and other words associated with a name  (R)
      $d - Dates associated with a name (NR)
      $e - Relator term (R)
      $f - Date of a work  (NR)
      $g - Miscellaneous information  (NR)
      $h - Medium  (NR)
      $i - Explanatory text  (R)
      $j - Attribution qualifier (R)
      $k - Form subheading (R)
      $l - Language of a work (NR)
      $m - Medium of performance for music (R)
      $n - Number of part/section of a work (R)
      $o - Arranged statement for music (NR)
      $p - Name of part/section of a work (R)
      $q - Fuller form of name (NR)
      $r - Key for music (NR)
      $s - Version (NR)
      $t - Title of a work (NR)
      $v - Form subdivision (R)
      $x - General subdivision  (R)
      $y - Chronological subdivision  (R)
      $z - Geographic subdivision (R)
      $0 - Record control number (R)
      $2 - Source of heading or term  (NR)
      $3 - Materials specified (NR)
      $4 - Relator code (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

710 - INDEX TERM--CORPORATE NAME (R)
   Indicators
      First - Type of corporate name entry element
         0 - Inverted name
         1 - Jurisdiction name
         2 - Name in direct order
      Second - Thesaurus
         0 - Library of Congress Subject Headings/Name authority file
         1 - LC subject headings for children's literature
         2 - Medical Subject Headings/NLM name authority file
         3 - National Agricultural Library subject authority file
         4 - Source not specified
         5 - Canadian Subject Headings/LAC name authority file
         6 - Répertoire de vedettes-matière
         7 - Source specified in subfield $2
   Subfield Codes
      $a - Corporate name or jurisdiction name as entry element (NR)
      $b - Subordinate unit (R)
      $c - Location of meeting (R)
      $d - Date of meeting or treaty signing (R)
      $e - Relator term  (R)
      $f - Date of a work (NR)
      $g - Miscellaneous information  (NR)
      $h - Medium (NR)
      $i - Explanatory text (R)
      $k - Form subheading (R)
      $l - Language of a work (NR)
      $m - Medium of performance for music (R)
      $n - Number of part/section/meeting (R)
      $o - Arranged statement for music (NR)
      $p - Name of part/section of a work (R)
      $r - Key for music (NR)
      $s - Version (NR)
      $t - Title of a work (NR)
      $v - Form subdivision (R)
      $x - General subdivision  (R)
      $y - Chronological subdivision  (R)
      $z - Geographic subdivision (R)
      $0 - Authority record control number or standard number (R)
      $2 - Source of heading or term  (NR)
      $3 - Materials specified (NR)
      $4 - Relator code (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

711  INDEX TERM--MEETING NAME (R)
   Indicators
      First - Type of meeting name entry element
         0 - Inverted name
         1 - Jurisdiction name
         2 - Name in direct order
      Second - Thesaurus
         0 - Library of Congress Subject Headings/Name authority file
         1 - LC subject headings for children's literature
         2 - Medical Subject Headings/NLM name authority file
         3 - National Agricultural Library subject authority file
         4 - Source not specified
         5 - Canadian Subject Headings/LAC name authority file
         6 - Répertoire de vedettes-matière
         7 - Source specified in subfield $2
   Subfield Codes
      $a - Meeting name or jurisdiction name as entry element (NR)
      $b - Number (R) [OBSOLETE]
      $c - Location of meeting  (R)
      $d - Date of meeting or treaty signing (NR)
      $e - Subordinate unit (R)
      $f - Date of a work (NR)
      $g - Miscellaneous information (NR)
      $h - Medium (NR)
      $i - Explanatory text (R)
      $j - Relator term   (R)
      $k - Form subheading (R)
      $l - Language of a work (NR)
      $n - Number of part/section/meeting (R)
      $p - Name of part/section of a work (R)
      $q - Name of meeting following jurisdiction name entry element (NR)
      $s - Version (NR)
      $t - Title of a work (NR)
      $v - Form subdivision (R)
      $x - General subdivision (R)
      $y - Chronological subdivision (R)
      $z - Geographic subdivision (R)
      $0 - Authority record control number or standard number (R)
      $2 - Source of heading or term  (NR)
      $3 - Materials specified (NR)
      $4 - Relator code(R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

720 - INDEX TERM--UNCONTROLLED NAME (R)
   Indicators
      First - Type of name
         # - Not specified
         1 - Personal
         2 - Other
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Name (NR)
      $e - Relator term (R)
      $4 - Relator code (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

730 - INDEX TERM--UNIFORM TITLE  (R)
   Indicators 
      First - Nonfiling characters
         0-9  Number of nonfiling characters
         # - Nonfiling characters not specified  [OBSOLETE]
      Second - Thesaurus
         0 - Library of Congress Subject Headings/Name authority file
         1 - LC subject headings for children's literature
         2 - Medical Subject Headings/NLM name authority file
         3 - National Agricultural Library subject authority file
         4 - Source not specified
         5 - Canadian Subject Headings/LAC name authority file
         6 - Répertoire de vedettes-matière
         7 - Source specified in subfield $2
   Subfield Codes
      $a - Uniform title (NR)
      $d - Date of treaty signing (R)
      $f - Date of a work (NR)
      $g - Miscellaneous information (NR)
      $h - Medium (NR)
      $i - Explanatory text (R)
      $k - Form subheading (R)
      $l - Language of a work (NR)
      $m - Medium of performance for music (R)
      $n - Number of part/section of a work (R)
      $o - Arranged statement for music (NR)
      $p - Name of part/section of a work  (R)
      $r - Key for music  (NR)
      $s - Version (NR)
      $t - Title of a work (NR)
      $v - Form subdivision (R)
      $x - General subdivision (R)
      $y - Chronological subdivision (R)
      $z - Geographic subdivision (R)
      $0 - Record control number (R)
      $2 - Source of heading or term (NR)
      $3 - Materials specified (NR)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

748 - INDEX TERM--CHRONOLOGICAL  (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Thesaurus
         0 - Library of Congress Subject Headings/Name authority file
         1 - LC subject headings for children's literature
         2 - Medical Subject Headings/NLM name authority file
         3 - National Agricultural Library subject authority file
         4 - Source not specified
         5 - Canadian Subject Headings/LAC name authority file
         6 - Répertoire de vedettes-matière
         7 - Source specified in subfield $2
   Subfield Codes
      $a - Chronological term (NR)
      $v - Form subdivision (R)
      $x - General subdivision  (R)
      $y - Chronological subdivision (R)
      $z - Geographic subdivision (R)
      $0 - Record control number (R)
      $2 - Source of heading or term (NR)
      $3 - Materials specified  (NR)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

750 - INDEX TERM--TOPICAL  (R)
   Indicators
      First - Level of subject
         # - No information available
         0 - No level specified
         1 - Primary subject
         2 - Secondary subject
      Second - Thesaurus
         0 - Library of Congress Subject Headings/Name authority file
         1 - LC subject headings for children's literature
         2 - Medical Subject Headings/NLM name authority file
         3 - National Agricultural Library subject authority file
         4 - Source not specified
         5 - Canadian Subject Headings/LAC name authority file
         6 - Répertoire de vedettes-matière
         7 - Source specified in subfield $2
   Subfield Codes
      $a - Topical term or geographic name entry element (NR)
      $b - Topical term following geographic name entry element (NR)
      $c - Location of event (NR)
      $d - Active date (NR)
      $i - Explanatory text  (R)
      $v - Form subdivision (R)
      $x - General subdivision  (R)
      $y - Chronological subdivision (R)
      $z - Geographic subdivision (R)
      $0 - Record control number (R)
      $2 - Source of heading or term (NR)
      $3 - Materials specified  (NR)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

751 - INDEX TERM--GEOGRAPHIC NAME (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Thesaurus
         0 - Library of Congress Subject Headings/Name authority file
         1 - LC subject headings for children's literature
         2 - Medical Subject Headings/NLM name authority file
         3 - National Agricultural Library subject authority file
         4 - Source not specified
         5 - Canadian Subject Headings/LAC name authority file
         6 - Répertoire de vedettes-matière
         7 - Source specified in subfield $2
   Subfield Codes
      $a - Geographic name (NR)
      $i - Explanatory text (R)
      $v - Form subdivision (R)
      $x - General subdivision (R)
      $y - Chronological subdivision (R)
      $z - Geographic subdivision (R)
      $0 - Record control number (R)
      $2 - Source of heading or term (NR)
      $3 - Materials specified (NR)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

753 - INDEX TERM--UNCONTROLLED (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Type of term or name
         # - No information provided
         0 - Topical term
         1 - Personal name
         2 - Corporate name
         3 - Meeting name
         4 - Chronological term
         5 - Geographic name
         6 - Genre/form term
   Subfield Codes
      $a - Index term (R)
      $b - Index term--succeeding level (R)
      $d - Index term referred from (R)
      $e - Example class number (R)
      $i - Explanatory text (R)
      $s - See also reference term (NR)
      $t - See also reference term--succeeding level (R)
      $u - Use reference term (NR)
      $v - Use reference term--succeeding level (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)  

754 - INDEX TERM--FACETED TOPICAL TERMS (R)
   Indicators
      First - Level of subject
         # - No information provided
         0 - No level specified
         1 - Primary
         2 - Secondary
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Focus term (R)
      $b - Non-focus term (R)
      $c - Facet/hierarchy designation (R)
      $v - Form subdivision (R)
      $y - Chronological subdivision (R)
      $z - Geographic subdivision (R
      $0 - Authority record control number (R)
      $2 - Source of heading or term (NR)
      $3 - Material specified (NR)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)


--Number Building Fields (76X)--
  761 - ADD OR DIVIDE LIKE INSTRUCTIONS  (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Combined note types
         0 - Not a combined note
         1 - Add or divide like portion of a combined note
         2 - Class elsewhere portion of a combined note
         3 - Relocation portion of a combined note
   Subfield Codes
      $a - Number where instructions are found--single number or beginning number of span (R)
      $b - Base number (NR)
      $c - Classification number--Ending number of span  (R)
      $d - Divided like number  (R)
      $e - Example class number  (R)
      $f - Facet designator  (R)
      $i - Explanatory text  (R)
      $n - Negative example class number  (R)
      $r - Root number  (R)
      $x - Other classification number  (R)
      $t - Topic (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $y - Table identification--schedule (R)  [OBSOLETE]
      $z - Table identification (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (NR)

762 - TABLE IDENTIFICATION (R)
   Indicators
      First - Table application sequence
         # - First
         2 - Second
         3 - Third
         4 - Fourth
      Second - Undefined
         # - Undefined
   Subfield codes
      $i - Explanatory text (R)
      $y - Schedule (NR)  [OBSOLETE]
      $z - Table number (NR)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

763 - INTERNAL SUBARRANGEMENT OR ADD TABLE ENTRY  (R)
   Indicators
      First - Classification number validity
         0 - Not a classification number entry
         1 - Standard valid classification number
         2 - Standard invalid classification number
         3 - Optional valid classification number
         4 - Optional invalid classification number
         5 - Obsolete classification number
      Second - Type of classification number
         0 - Single number
         1 - Defined number span
         2 - Summary number span
         8 - Other 
   Subfield Codes
      $a - Classification number--single number or beginning number of span  (R)
      $b - Base number (NR)
      $c - Classification number--ending number of span (R)
      $d - Divided like number (R)
      $e - Example class number (R)
      $h - Caption hierarchy (R)
      $i - Explanatory text (R)
      $j - Caption (NR)
      $k - Summary number span caption hierarchy (R)
      $m - Manual note (NR)
      $n - Number where instructions are found (R)
      $p - Corresponding classification field (R)
      $r - Root number (R)
      $s - See reference (R)
      $x - Other classification number (R)
      $y - Type of division (R)
      $z - Table identification (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (NR)

764 - RULE IDENTIFICATION  (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Rule number (NR)
      $i - Explanatory text  (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

765 - SYNTHESIZED NUMBER COMPONENTS  (R)
   Indicators
      First - Field of number analyzed
         0 - 153 field
         1 - Other field
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Number where instructions are found--single number or beginning number of span (R)
      $b - Base number (R)
      $c - Classification number--ending number of span (R) 
      $c - Number where instructions are found--Ending number of span (R) [REDEFINED]
      $f - Facet designator  (R)
      $r - Root number (R)
      $s - Digits added from classification number in schedule or external table (R)
      $t - Digits added from internal subarrangement or add table (R)
      $u - Number being analyzed (R)
      $v - Number in internal subarrangement or add table where instructions are found  (R)
      $w - Table identification--internal subarrangement or add table (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $y - Table identification--schedule (R)  [OBSOLETE]
      $z - Table identification (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

766 - SECONDARY TABLE INFORMATION (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield codes
      $a - Secondary table applicability (NR)
      $y - Type of division (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (R)

768 - CITATION AND PREFERENCE ORDER INSTRUCTIONS  (R)
   Indicators
      First - Type of instruction
         0 - Citation and preference order note
         1 - Table of preference
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Classification number--single number or beginning number of span (R)
      $c - Classification number--Ending number of span (R)
      $e - Example class number (R)
      $i - Explanatory text (R)
      $j - Caption (R)
      $n - Negative example class number (R)
      $t - Topic used as example of citation and preference order instruction (R)
      $x - Exception to table of preference (R)
      $y - Table sequence number for internal subarrangement or add table (R)
      $z - Table identification--Table number (R)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (NR)


--Other Variable Fields (8XX)--
856 - ELECTRONIC LOCATION AND ACCESS  (R)
   Indicators
      First - Access method
         # - No information provided
         0 - Email
         1 - FTP
         2 - Remote login (Telnet)
         3 - Dial-up
         4 - HTTP
         7 - Method specified in subfield $2
      Second - Relationship
         # - No information provided
         0 - Resource
         1 - Version of resource
         2 - Related resource
         8 - No display constant generated
   Subfield Codes
      $a - Host name (R)
      $b - Access number (R)
      $c - Compression information (R)
      $d - Path (R)
      $f - Electronic name (R)
      $g - Uniform Resource Name [OBSOLETE]
      $h - Processor of request  (NR)
      $i - Instruction (R)
      $j - Bits per second (NR)
      $k - Password (NR)
      $l - Logon (NR)
      $m - Contact for access assistance (R)
      $n - Name of location of host (NR)
      $o - Operating system (NR)
      $p - Port (NR)
      $q - Electronic format type (NR)
      $r - Settings (NR)
      $s - File size (R)
      $t - Terminal emulation (R)
      $u - Uniform Resource Identifier (R)
      $v - Hours access method available (R)
      $w - Record control number (R)
      $x - Nonpublic note (R)
      $y - Link text (R)
      $z - Public note (R)
      $2 - Access method (NR)
      $3 - Materials specified (NR)
      $6 - Linkage (NR)
      $8 - Field link and sequence number (NR)

880 - ALTERNATE GRAPHIC REPRESENTATION (R)
   Indicators
      First - Same as associated field
      Second - Same as associated field
   Subfield Codes
      $6 - Linkage (NR)
      $a-z - Same as associated field
      $0-5 - Same as associated field
      $7-9 - Same as associated field

883 - MACHINE-GENERATED METADATA PROVENANCE (R)
   Indicators
      First - Method of machine assignment
         # - No information provided/not applicable
         0 - Fully machine-generated
         1 - Partially machine-generated
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Generation process (NR)
      $c - Confidence value (NR)
      $d - Generation date (NR)
      $q - Generation agency (NR)
      $x - Validity end date (NR)
      $u - Uniform Resource Identifier (NR)
      $w - Bibliographic record control number (R)
      $0 - Authority record control number or standard number (R)
      $8 - Field link and sequence number (R)

Library of Congress >> MARC >> Classification Field List
(04/28/2014)
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