Record Type |
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BIB |
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Input Standards |
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Applicable Fields (R=Repeatable NR=Nonrepeatable) | Input Standards (Full/Minimal) | |
600 | Subject Added Entry--Personal Name (R) | Required if applicable/Optional |
610 | Subject Added Entry--Corporate Name (R) | Required if applicable/Optional |
611 | Subject Added Entry--Meeting Name (R) | Required if applicable/Optional |
630 | Subject Added Entry--Uniform Title (R) | Required if applicable/Optional |
647 | Subject Added Entry--Named Event (R) | Required if applicable/Optional |
648 | Subject Added Entry--Chronological Term (R) | Required if applicable/Optional |
650 | Subject Added Entry--Topical Term (R) | Required if applicable/Optional |
651 | Subject Added Entry--Geographic Name (R) | Required if applicable/Optional |
654 | Subject Added Entry--Faceted Topical Terms (R) | Optional/Optional |
662 | Subject Added Entry--Hierarchical Place Name (R) | Optional/Optional |
688 | Subject Added Entry--Type of Entity Unspecified (R) | Optional/Optional |
690 | Local Subject Added Entry--Topical Term (R) | Optional/Optional |
691 | Local Subject Added Entry--Geographic Name (R) | Optional/Optional |
696 | Local Subject Added Entry--Personal Name (R) | Optional/Optional |
697 | Local Subject Added Entry--Corporate Name (R) | Optional/Optional |
698 | Local Subject Added Entry--Meeting Name (R) | Optional/Optional |
699 | Local Subject Added Entry--Uniform Title (R) | Optional/Optional |
1st Indicator Undefined [647, 648, 651, 662, 688, 691] | ||
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Undefined | |
1st Indicator Level of subject [650, 654, 690] | ||
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No information provided | |
0 | No level specified | |
1 | Primary | |
2 | Secondary | |
2nd Indicator Undefined [654, 662] | ||
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Undefined | |
2nd Indicator Thesaurus [647, 648, 650, 651, 688, 690, 691] | ||
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No information provided [688, 690, 691] | |
0 | Library of Congress Subject Headings | |
1 | LC subject headings for children's literature | |
2 | Medical Subject Headings | |
3 | National Agricultural Library subject authority file | |
4 | Source not specified | |
5 | Canadian Subject Headings | |
6 | Répertoire de vedettes-matière | |
7 | Source specified in subfield ǂ2 | |
For information regarding indicators for personal name subject access points, see Personal Names--General Information; for corporate name subject access points, see Corporate Names--General Information; for meeting subject access points, see Meeting Names--General Information; for preferred title subject access points, see Preferred Titles--General Information. |
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Subfields (R=Repeatable NR=Nonrepeatable) | Input Standards (Full/Minimal) | |
ǂa | Named event (NR) [647] | Mandatory/Mandatory |
ǂa | Chronological term (NR) [648] | Mandatory/Mandatory |
ǂa | Topical term or geographic name as entry element (NR) [650, 690] | Mandatory/Mandatory |
ǂa | Geographic name (NR) [651, 691] | Mandatory/Mandatory |
ǂa | Focus term (R) [654] | Required if applicable/Required if applicable |
ǂa | Country or larger entity (R) [662] | Required if applicable/Required if applicable |
ǂa | Name, title, or term (NR) [688] | Mandatory/Mandatory |
ǂb | Topical term following geographic name as entry element (NR) [650, 690] | Required if applicable. Pre-AACR2 only/Required if applicable. Pre-AACR2 only |
ǂb | Non-focus term (R) [654] | Required if applicable/Required if applicable |
ǂb | First-order political jurisdiction (NR) [662] | Optional/Optional |
ǂb | Geographic element following geographic name (R) [691] | Required if applicable/Required if applicable |
ǂc | Location of named event (R) [647] | Required if applicable/Required if applicable |
ǂc | Location of an event (NR) [650, 690] | Required if applicable/Required if applicable |
ǂc | Facet/hierarchy designation (R) [654] | Mandatory/Mandatory |
ǂc | Intermediate political jurisdiction (R) [662] | Optional/Optional |
ǂd | Date of named event (NR) [647] | Required if applicable/Required if applicable |
ǂd | Active dates (NR) [650, 690] | Required if applicable/Required if applicable |
ǂd | City (NR) [662] | Required if applicable/Required if applicable |
ǂe | Relator term (R) [650, 651, 654, 662, 688, 690] | Optional/Optional |
ǂf | City subsection (R) [662] | Optional/Optional |
ǂg | Miscellaneous information (R) [647, 650, 651, 688, 690, 691] | Required if applicable/Required if applicable |
ǂg | Other nonjurisdictional geographic region and feature (R) [662] | Optional/Optional |
ǂh | Extraterrestrial area (R) [662] | Optional/Optional |
ǂv | Form subdivision (R) [All except 662] | Required if applicable/Required if applicable |
ǂx | General subdivision (R) [All except 654, 662] | Required if applicable/Required if applicable |
ǂy | Chronological subdivision (R) [All except 662] | Required if applicable/Required if applicable |
ǂz | Geographic subdivision (R) [All except 662] | Required if applicable/Required if applicable |
ǂ0 | Authority record control number or standard number (R) [647, 648, 650, 651, 654, 662, 688] | Optional/Optional |
ǂ1 | Real World Object URI (R) [All fields] | Optional/Optional |
ǂ2 | Source of heading or term (NR) [All fields] | Required if applicable/Required if applicable |
ǂ3 | Materials specified (NR) [647, 648, 650, 651, 654, 688, 690, 691] | Optional/Optional |
ǂ4 | Relationship (R) [650, 651, 654, 662, 688] | Optional/Optional |
ǂ6 | Linkage (NR) [All fields] | System supplied/System supplied |
ǂ8 | Field link and sequence number (R) [All fields] | Optional/Optional |
ǂ9 | Special entry (NR) [690, 691] | Optional/Optional |
Definition |
A name, title, term, or phrase used as a subject access point. Subject access points are assigned to a bibliographic record to provide access according to established subject cataloging principles and guidelines. Use to describe the content of the cataloged resource. Genre/form terms describe what a cataloged resource is, not what it is about. Refer to Personal Names--General Information for information about personal name subject access points; refer to Corporate Names--General Information for information about corporate name subject access points; refer to Meeting Names--General Information for information about meeting name subject access points; refer to Preferred Titles--General Information for information about preferred title subject access points. OCLC also makes available nonstandard MARC fields to use for additional subject access points not supported by cataloging rules. Enter information in fields 696, 697, 698, or 699 as you would in corresponding standard MARC fields. These fields do not remain in the WorldCat record. They are retained in the record displayed during the editing session, the exported record, and records delivered via other services. For information about 6xx fields not covered on this page, refer to field 653 for information about uncontrolled index terms; refer to field 655 for information about genre/form index terms; refer to field 656 for information about occupation index terms; refer to field 657 for information about function index terms; refer to field 658 for information about curriculum objective index terms. For information on punctuation, see the Punctuation section below. |
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Guidelines |
Use the 6xx fields to provide subject access entries and terms. Most of the 6xx fields contain subject added entries or access terms based on the authority files or lists identified in the 2nd indicator or in subfield ǂ2. If you are creating full-level records, add subject access points for resources that normally require subject access points. If you are inputting minimal-level records, optionally add subject access points. You are encouraged to enter at least one subject access point. The Library of Congress has established guidelines for tagging certain corporate bodies and preferred titles. These guidelines and lists of problematic access points are occasionally updated and are available in MARC 21, Appendix E - Alphabetical List of Ambiguous Headings. Consult these guidelines when constructing these access points. Special geographic guidelines:
For subfields ǂv, ǂx, ǂy, and ǂz use the following guidelines:
Usual practice is to spell out all subject entries; however, you should not spell out the following subject entries:
See the LC Subject Headings Manual for more information about abbreviations. |
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1st Indicator |
The definition of the 1st indicator position is specific to each field. |
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647, 648, 651, 662, 688, 691 | Undefined. The 1st indicator position is undefined and contains a blank. |
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650, 654, 690 | Level of subject. The level of the subject entry. Use the 1st indicator to distinguish primary and secondary descriptors. |
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2nd Indicator |
The definition of the 2nd indicator position is specific to each field. |
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654, 662 | Undefined. The 2nd indicator position is undefined and contains a blank. |
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647, 648, 650, 651, 688, 690, 691 | Thesaurus. The thesaurus or subject heading system used in constructing the subject heading. |
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Subfields |
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ǂa Named event [647] |
Name of an event which cannot be regarded as a responsible agent. Enter parenthetical qualifying information associated with the term other than date and place in subfield ǂa.
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ǂa Chronological term [648] |
A chronological name used as an entry element for a topical term. Enter parenthetical qualifying information associated with the term also in subfield ǂa.
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ǂa Topical term or geographic name as entry element [650, 690] |
A topical subject or geographic name used as an entry element for a topical term. Enter parenthetical qualifying information associated with the term also in subfield ǂa.
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ǂa Geographic name [651, 691] |
A geographic name. Enter parenthetical qualifying information also in subfield ǂa. Enter parenthetical qualifying information associated with the term also in subfield ǂa.
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ǂa Focus term [654] |
A term which is considered the focus term. A focus term is the activity, being, object, or concept forming the basis of the index entry. Repeat subfield ǂa when there is more than one expression in the field.
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ǂa Country or larger entity [662] |
The name of a country or a larger political jurisdiction. Subfield ǂa also contains the names of geographical areas/entities such as continents or hemispheres at a country level or higher. Subfield ǂa may be repeated for hierarchies when multiple levels are given, retaining the order highest-to-lowest.
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ǂa Name, title, or term [688] |
An unspecified name, title, or term.
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ǂb Topical term following geographic name as entry element [650, 690] |
A topical term that is entered under a geographic name in subfield ǂa. Subfield ǂb is unlikely to be used in field 650. |
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ǂb Non-focus term [654] |
A term other than the focus term. |
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ǂb First-order political jurisdiction [662] |
The name of a first-order political jurisdiction or division and, depending on the country, including the names of states, provinces, territories, départements, etc.
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ǂb Geographic element following geographic name [691] |
An additional geographic element following the name in subfield ǂa. |
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ǂc Location of named event [647] |
Place name or a name of an institution where a named event occurred. Multiple adjacent locations are contained in repeated subfields ǂc.
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ǂc Location of an event [650, 690] |
The location at which an event occurred. |
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ǂc Facet/hierarchy designation [654] |
A designation identifying the facet/hierarchy designation for each term found in subfields ǂa and ǂb. The designations and their associated facets/hierarchies are found in the thesaurus identified in subfield ǂ2. The designation in subfield ǂc always precedes the data to which it is associated. |
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ǂc Intermediate political jurisdiction [662] |
The name of a second-order or lower political jurisdiction or division, not including towns or cities, and, depending on the country, including the names of counties, islands, municipalities, prefectures, regions, etc. Subfield ǂc may be repeated for hierarchies when multiple levels are given, retaining the order highest-to-lowest.
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ǂd Date of named event [647] |
Date or time period related to a named event.
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ǂd Active dates [650, 690] |
The time during which an event occurred.
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ǂd City [662] |
The name of a city or town.
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ǂe Relator term [650, 651, 654, 662, 688, 690] |
A term that specifies the relationship between the topical heading and the described materials, e.g., subject.
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ǂf City subsection [662] |
The name of a smaller unit within a populated place, e.g., neighborhoods, parks, or streets.
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ǂg Miscellaneous information [647, 650, 651, 688, 690, 691] |
Data element that is not more appropriately contained in another defined subfield.
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ǂg Other nonjurisdictional geographic region and feature [662] |
The name of a terrestrial nonjurisdictional geographic entity, e.g., rivers, lakes, islands, mountains, etc. Subfield ǂg may be repeated for hierarchies when multiple levels are given, retaining the order highest-to-lowest.
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ǂh Extraterrestrial area [662] |
The name of any extraterrestrial entity or space and includes solar systems, galaxies, star systems, planets, as well as geographic features of individual planets, etc. Subfield ǂh may be repeated for hierarchies when multiple levels are given, retaining the order highest-to-lowest.
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ǂv Form subdivision [All except 662] |
A specific kind or genre of material defined by the thesaurus being used. Use only when a form subject subdivision is added to a main term. Use subfield ǂv also for form terms when they function as indicated above. Use subfield ǂx if the terms function as general subdivisions. A form subdivision in subfield ǂv is generally the last subfield in the field. Repeat subfield ǂv if you use more than one form subdivision.
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ǂx General subdivision [All except 654, 662] |
A subject subdivision that is not more appropriately contained in subfield ǂv, ǂy, or ǂz. Use subfield ǂx only when a general topical subdivision is added to a main term.
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ǂy Chronological subdivision [All except 662] |
A subject subdivision that represents a period of time. Use only when a chronological subject subdivision is added to a main term.
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ǂz Geographic subdivision [All except 662] |
A geographic subject subdivision. Use only when a geographic subject subdivision is added to a main term.
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ǂ0 Authority record control number or standard number [647, 648, 650, 651, 654, 662, 688] |
For information about subfield ǂ0, see Control Subfields. |
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ǂ1 Real World Object URI [All fields] |
For information about subfield ǂ1, see Control Subfields. |
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ǂ2 Source of heading or term [All fields] |
A MARC code that identifies the source list from which the heading in a subject added entry was assigned. Use only when the 2nd indicator value is 7. See Subject Heading and Term Source Codes.
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ǂ3 Materials specified [647, 648, 650, 651, 654, 688, 690, 691] |
For information about subfield ǂ3, see Control Subfields. |
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ǂ4 Relationship [650, 651, 654, 662, 688] |
For information about subfield ǂ4, see Control Subfields. |
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ǂ6 Linkage [All fields] |
Data that link fields when non-Latin script is entered. This subfield is system supplied and does not appear in OCLC online displays. Do not manually add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields. |
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ǂ8 Field link and sequence number [All fields] |
For information about subfield ǂ8, see Control Subfields. |
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ǂ9 Special entry [690, 691, 696, 697, 698, 699] |
For information about subfield ǂ9, see Control Subfields. |
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Punctuation |
For more information on punctuation, including OCLC policy, see section 2.8, Punctuation. |
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Indexing |
For indexing and searching information, see Searching WorldCat Indexes, 6xx fields. |
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MARC 21 |
For more information, including content designator history, see MARC 21 Format for Bibliographic Data, 6xx. |
This page last revised: December 28, 2020