650 - Subject Added Entry-Topical Term (R)
MARC 21 Bibliographic - Full
October 2007
First Indicator Level of subject # - No information provided 0 - No level specified 1 - Primary 2 - Secondary
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Second Indicator Thesaurus 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 $2
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Subfield Codes
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Main term portion $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 dates (NR) $e - Relator term (R) $4 - Relator code (R)
Subject subdivision portion $v - Form subdivision (R) $x - General subdivision (R) $y - Chronological subdivision (R) $z - Geographic subdivision (R)
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$0 - Authority 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)
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FIELD DEFINITION AND SCOPE
Subject added entry in which the entry element is a topical term.
Topical subject added entries may consist of general subject terms including names of
events or objects. Subject added entries are assigned to a bibliographic record to
provide access according to generally accepted thesaurus-building rules (e.g.,
Library of Congress Subject Headings (LCSH), Medical Subject
Headings (MeSH)). Field 650 may be used by any institution assigning subject
headings based on the lists and authority files identified in the second indicator
position or in subfield $2 (Source of heading or term).
A title (e.g., Bible and atheism), a geographic name (e.g., Iran in the Koran), or the
name of a corporate body (e.g., Catholic Church and humanism) used in a phrase subject
heading are also recorded in field 650.
GUIDELINES FOR APPLYING CONTENT DESIGNATORS
■ INDICATORS
First Indicator - Level of subject Used to distinguish primary and secondary descriptors.
# - No information provided
0 - No level specified Level of the subject term could be determined but is not specified.
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650 |
00$aFlour industry$vPeriodicals.
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1 - Primary Main focus or subject content of the material.
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650 |
17$aCareer Exploration.$2ericd
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650 |
#7$aCareer Exploration.$2ericd
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650 |
17$aCooks.$2ericd
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2 - Secondary Less important aspect of the content of the material.
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650 |
27$aFood Service.$2ericd
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650 |
27$aJunior High Schools.$2ericd
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650 |
27$aSimulation.$2ericd [Primary and secondary subject content identified.] |
Second Indicator - Thesaurus Subject heading system or thesaurus used in constructing the subject heading.
0 - Library of Congress Subject Headings Subject added entry conforms to and is appropriate for use in the
Library
of Congress Subject Headings (LCSH) and the Name authority files that
are maintained by the Library of Congress.Conforms to
LCSH is defined as:
- headings (or headings and subdivisions) found in the LC authority files
(including name authorities), or in the latest edition of LCSH,
including the latest microfiche, printed version, CD-ROM, and supplements;
- headings constructed following AACR2;
- headings found in the LC authority files, the latest edition of
LCSH, or constructed following AACR2 to which is added a
free-floating or regular subdivision according to the rules stated in the
Subject Cataloging Manual: Subject Headings, particularly
subdivisions listed in the pattern lists, and geographic subdivisions
formulated and applied according to the rules in the manual;
1 - LC subject headings for children's literature Subject added entry conforms to the "AC Subject Headings" section of the
Library of Congress Subject Headings and is appropriate for use in
the LC Annotated Card Program.
2 - Medical Subject Headings Subject added entry conforms to and is appropriate for use in the National
Library of Medicine authority files.
3 - National Agricultural Library subject authority file Subject added entry conforms to and is appropriate for use in the National
Agricultural Library subject authority file.
4 - Source not specified Subject added entry conforms to a controlled list that cannot be identified by
second indicator values 0-3, 5-6 or by a code in subfield $2.Field 653 (Index Term-Uncontrolled) is used to record terms that are not
derived from controlled subject heading lists.
5 - Canadian Subject Headings Subject added entry conforms to and is appropriate for use in the Canadian
Subject Headings that is maintained by the Library and Archives
Canada.
6 - Répertoire de vedettes-matière Subject added entry conforms to the Répertoire de vedettes-matière
that is maintained by the Bibliothèque de l'Université Laval.
7 - Source specified in subfield $2 Subject added entry conforms to a set of subject heading system/thesaurus
building rules. The identifying code is given in subfield $2.
■ SUBFIELD CODES
$a - Topical term or geographic name entry element Topical subject or a geographic name used as an entry element for a topical term.
Parenthetical qualifying information associated with the term is not separately
subfield coded.
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650 |
#0$aAmish.
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650 |
#0$aKalmyk cattle.
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650 |
#0$aAstronauts.
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#0$aEgypt in the Bible.
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650 |
#0$aBASIC (Computer program language)
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#0$aBull Run, 2d Battle, 1862.
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#0$aConcertos (String orchestra)
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#0$aVocal music$zFrance$y18th century.
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#0$aDentistry$vJuvenile films.
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#5$aCanadian wit and humor (English)
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$b - Topical term following geographic name entry element Topical term that is entered under a geographic name contained in subfield
$a. This construction is not used in AACR2 formulated records.
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650 |
#0$aCaracas.$bBolivar Statue.
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$c - Location of event
$d - Active dates Time period during which an event occurred.
$e - Relator term Specifies the relationship between the topical heading and the described
materials, e.g., depicted.
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650 |
#0$aSeabiscuit (Race horse),$edepicted. [Photograph of Seabiscuit, the race horse.] |
650 |
#0$aUnicorns,$edepicted. [Bayeux Tapestry, showing a unicorn.] |
$v - Form subdivision Form subdivision that designates a specific kind or genre of material as defined
by the thesaurus being used. Subfield $v is appropriate only when a
form subject subdivision is added to a main term.
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650 |
#0$aScuba diving$vPeriodicals.
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650 |
#0$aVomiting$xTreatment$vHandbooks, manuals, etc.
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$x - General subdivision Subject subdivision that is not more appropriately contained in subfields
$v (Form subdivision), $y (Chronological subdivision), or
$z (Geographic subdivision). Subfield $x is appropriate only
when a general topical subdivision is added to a main term.
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650 |
#0$aRacetracks (Horse-racing)$zUnited States$xHistory.
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650 |
#0$aNumismatics$xCollectors and collecting.
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$y - Chronological subdivision Subject subdivision that represents a period of time. Subfield $y is
appropriate only when a chronological subject subdivision is added to a main
term.
$z - Geographic subdivision Geographic subject subdivision. Subfield $z is appropriate in field 650
only when a geographic subject subdivision is added to a main term.
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650 |
#0$aWorld War, 1939-1945$xCampaigns$zTunisia.
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#0$aReal property$zMississippi$zTippah County$vMaps.
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$0 - Authority record control number
$2 - Source of heading or term
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650 |
#7$aEducational buildings$zWashington (D.C.)$y1890-1910.$2lctgm
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17$aAcoustic measurement.$2test
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$3 - Materials specified Part of the described materials to which the field applies.
$8 - Field link and sequence number
INPUT CONVENTIONS
Punctuation - Field 650 ends with a mark of punctuation or a closing parenthesis. If the final
subfields are subfield $2 or $3, the mark of punctuation precedes
those subfields.
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650 |
17$aCareer Exploration.$2ericd
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#0$aBallads, English$zHudson River Valley (N.Y. and N.J.)
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Main term portion followed by a subject subdivision does not end with a mark of
punctuation unless the main term portion ends with an abbreviation, initial/letter, or
open date.
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#0$aRain and rainfall$zWashington (State)$zSeattle$vMaps.
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Spacing - No spaces are used in initialisms, acronyms, or abbreviations.
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650 |
#0$aMARC formats.
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650 |
#0$aC.O.D. shipments.
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Display Constant
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[dash associated with the content of subfield $v,
$x, $y, or $z] |
Dash ( - ) that precedes a subject subdivision in an extended subject heading is not
carried in the machine-readable record. It may be system generated as a display constant
associated with the content of subfield $v, $x, $y, and
$z.
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Content designated field :
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650 |
#0$aNuclear energy$xHistory.
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Display example:
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Nuclear energy-History.
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Initial Article - Initial articles (e.g., The) occurring at the beginning of topical subject added entry
fields are usually omitted in most languages (except when the intent is to file on the
article).
Any diacritics and/or special characters occurring at the beginning of fields are
retained. Note that such characters are usually ignored for purposes of sorting and
filing.
CONTENT DESIGNATOR HISTORY
$b - Topical term following geographic name as entry element [OBSOLETE, 1981]
Subfield was restored for use in retrospective record conversion in 1987.
$4 - Relator code [NEW, 2005]