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650  Subject Added Entry–Topical Term (R)

Input Standards

Required if applicable/Optional
1st Indicator  Level of subject
blank character No information provided
0 No level specified
1 Primary
2 Secondary
2nd Indicator  Thesaurus
0 Library of Congress subject heading
1 LC subject heading for children's literature
2 Medical subject heading
3 National Agricultural Library subject authority file
4 Source not specified
5 Canadian subject heading
6 Répertoire de vedettes-matière
7 Source is specified in subfield ‡2
8 Sears subject heading
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards
‡a Topical term or geographic name as entry element (NR) Mandatory/Mandatory
‡b Topical term following geographic name as entry element (NR) Required if applicable. Pre-AACR2 only/Required if applicable. Pre-AACR2 only
‡c Location of an event (NR) Required if applicable/Required if applicable
‡d Active dates (NR) Required if applicable/Required if applicable
‡e Relator term (R) Required if applicable/Required if applicable
‡v Form subdivision (R) Required if applicable/Required if applicable
‡x General subdivision (R) Required if applicable/Required if applicable
‡y Chronological subdivision (R) Required if applicable/Required if applicable
‡z Geographical subdivision (R) Required if applicable/Required if applicable
‡0 Authority record control number (R) Optional/Optional
‡2 Source of heading or term (NR) Required if applicable/Required if applicable
‡3 Materials specified (NR) Optional/Optional
‡4 Relator code (R) Optional/Optional

Definition

A topical subject used as a subject added entry. Subject added entries are assigned to a bibliographic record to provide access according to established subject cataloging principles and guidelines. Any institution assigning subject headings based on the lists and authority files identified in the 2nd indicator position or in subfield ‡2 may use field 650. A topical subject added entry consists of a general subject term including the name of an event or object. Use for the following types of topical subject added entries:

  • General terms (e.g., Dogs or Chemistry) of the type listed in Library of Congress Subject Headings and other thesauri
  • Names of deities, fictitious characters and mythological figures not capable of authorship (e.g., Devil; God; Hornblower, Horatio (Fictitious character); Robin Hood (Legendary character) or Zeus (Greek deity))
  • Names of events and holidays (e.g., Tet Offensive, 1968 or Ramadan)
  • Names or terms applied to individual objects or classes of objects (e.g., Universities and colleges)
  • Systematic names of families, genera, species in botany and zoology and chemical compounds (e.g., Hemiptera)

Use field 650 also for a geographic name (e.g., Iran in the Koran), the name of a corporate body (e.g., Catholic Church and humanism) or a title (e.g., Bible and atheism) included in a phrase subject heading.

Use field 690 (Local Subject Added Entry–Topical Term) if the topical subject entry is locally devised (i.e., not based on LC, AC, NLM, NAL, NLC or Sears).

1st Indicator

Level of subject. The level of the subject entry. Use the 1st indicator to distinguish primary and secondary descriptors.

 
blank character

No information provided. No information as to the level of the subject term is provided.

650   0 Architecture, Modern ‡y19th century.
 
0

No level specified. The level of the subject term could be determined, but is not specified.

650 0 0 Flour and feed trade ‡v Periodicals.
 
1

Primary. A subject covers the main focus or subject content of the material.

650 1 2 Cardiovascular Physiology ‡v Congresses.
650 1 7 Career Exploration. ‡2 ericd
650 1 7 Cooks. ‡2 ericd
 
2

Secondary. A subject covers a less important aspect of the content of the material.

650 2 2 Carbon Monoxide ‡x metabolism ‡v Congresses.
650 2 7 Food Service. ‡2 ericd
650 2 7 Junior High Schools. ‡2 ericd
650 2 7 Simulation. ‡2 ericd
[Primary and secondary subject content is identified.]

2nd Indicator

Thesaurus. The thesaurus or subject heading system used in constructing the subject heading.

 
0

Library of Congress subject heading. The formulation of the subject added entry conforms to Library of Congress Subject Headings (LCSH). This includes:

  • Topical headings (or topical headings and subdivisions) found in the LC subject authority file or in the latest edition of LCSH, including the latest supplements
  • Topical headings found in the LC subject authority file or in the latest edition of LCSH to which is added a free-floating or regular subdivision according to the rules stated in the Subject Headings Manual (formerly called Subject Cataloging Manual: Subject Headings), particularly subdivisions listed in the pattern lists and geographic subdivisions
  • Topical headings not printed in LCSH in the past, but which have been used by LC and which are not likely to have changed (e.g., names of chemical compounds)
  • Certain music headings with qualifiers specifying instruments or vocal parts when the main heading has a general scope note printed in LCSH, with or without a general see also reference

Use of value 0 requires that the added entry is appropriate for use in LCSH.

 
1

LC subject heading for children's literature. The formulation of the subject added entry conforms to the "AC Subject Headings" section of Library of Congress Subject Headings. Use of value 1 requires that the added entry is appropriate for use in the LC Annotated Card Program.

 
2

Medical subject heading. The formulation of the subject added entry conforms to the National Library of Medicine (NLM) authority files. Use of value 2 requires that the added entry is appropriate for use in the NLM authority files.

 
3

National Agricultural Library subject authority file. The formulation of the subject added entry conforms to the National Agricultural Library (NAL) subject authority file. Use of value 3 requires that the added entry is appropriate for use in the NAL authority files.

 
4

Source not specified. The formulation of the subject added entry conforms to a controlled list, but the source cannot be specified by one of the thesaurus or subject heading systems covered by the other 2nd indicator values or by a code for a specific subject heading list in subfield ‡2. Use field 653 (Index Term–Uncontrolled) to record terms that are not derived from controlled subject heading lists.

 
5

Canadian subject heading. The formulation of the subject added entry conforms to the Canadian Subject Headings. Use of value 5 requires that the added entry is appropriate for use in Canadian Subject Headings.

 
6

Répertoire de vedettes-matière. The formulation of the subject added entry conforms to the Répertoire de vedettes-matière maintained by the Bibliothèque de l'Université de Laval. Use of value 6 requires that the added entry is appropriate for use in Répertoire de vedettes-matière.

 
7

Source is specified in subfield ‡2 . Subject headings or terms based on other subject authorities (i.e., on authorities other than those listed here). Identify the source in subfield ‡2.

650   7 Children of pregnant women. ‡2 henn
 
8

Sears subject heading. OCLC-defined value. The formulation of the subject added entry conforms to the Sears List of Subject Headings.

Subfields

 
‡a Topical term or geographic name as entry element

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 ‡a.

650   7 "Mad scientist" (Concept) ‡2 henn
‡b Topical term following geographic name as entry element

A topical term that is entered under a geographic name in subfield ‡a. Pre-AACR2 headings only.

650   0 Caracas. ‡b Bolivar Statue.
[Pre-AACR2.]
‡c Location of an event

The location at which an event occurred.

‡d Active dates

The time during which an event occurred.

‡e Relator term

A term that specifies the relationship between the topical heading and the described materials, e.g., subject.

650   0 Unicorns, ‡e depicted.
[Bayeux Tapestry, showing a unicorn]
‡v Form subdivision

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 ‡v also for form terms when they function as indicated above. Use subfield ‡x if the terms function as general subdivisions. A form subdivision in subfield ‡v is generally the last subfield in the field. Repeat subfield ‡v if you use more than one form subdivision.

650   0 Dentistry ‡v Juvenile films.
650   7 Women tea-trade executives ‡z London, England ‡v Fiction. ‡2 henn
‡x General subdivision

A subject subdivision that is not more appropriately contained in subfield ‡v, ‡y or ‡z. Use subfield ‡x only when a general topical subdivision is added to a main term.

650   0 Racetracks (Horse racing) ‡z United States ‡x History.
‡y Chronological subdivision

A subject subdivision that represents a period of time. Use only when a chronological subject subdivision is added to a main term.

650   0 Architecture, Modern ‡y 19th century.
‡z Geographical subdivision

A geographic subject subdivision. Use only when a geographic subject subdivision is added to a main term.

650   0 Real property ‡z Mississippi ‡z Tippah County ‡v Maps.
‡0 Authority record control number

Subfield ‡0 (zero) contains the system control number of the related authority record or a standard identifier such as an International Standard Name Identifier (ISNI). The control number or identifier is preceded by the appropriate MARC Organization code (for a related authority record) or the Standard Identifier source code (for a standard identifier scheme), enclosed in parentheses. See MARC Code List for Organizations (http://www.loc.gov/marc/organizations/orgshome.html) for a listing of organization codes and Standard Identifier Source Codes (http://www.loc.gov/standards/sourcelist/standard-identifier.html) for code systems for standard identifiers. Subfield ‡0 is repeatable for different control numbers or identifiers.

Do not input subfield ‡0 in master records, instead use the control headings function. Local authority identifiers may be entered in subfield ‡0 locally, but should not be added to master records in WorldCat.

‡2 Source of heading or term

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 (http://www.loc.gov/standards/sourcelist/subject.html).

650   7 Acoustic measurement. ‡2 test
650   7 Mopiness. ‡2 henn
‡3 Materials specified

The part of the described materials to which the field applies.

‡4 Relator code

Contains the MARC code that indicates the relationship of the entry to the item.

See MARC Code Lists for Relators (http://www.loc.gov/marc/relators/).

650   0 Unicorns. ‡4 dpc
[Bayeux Tapestry, showing a unicorn]
650   0 Niagara Falls (N.Y. and Ont.) ‡e dpc

Indexing

For indexing and searching information, see Searching WorldCat Indexes, field 650.

Printing

Field 650 prints as a heading and tracing. Subfields ‡2, ‡3, and ‡4 do not print. In the tracing paragraph, the print program supplies consecutive Arabic numbering. The print program supplies a period after the last printing subfield unless final punctuation (. ! ?) is present. See "6xx Introduction" for more information.