X80 - General Subdivisions-General Information
MARC 21 Authority
October 2002
"Full" documentation refers to the MARC 21 Format for Authority Data that contains detailed descriptions of every data element, along with examples, input conventions and history sections.
"Concise" documentation refers to the MARC 21 Concise Format for Authority Data that contains abridged descriptions of every data element, along with examples.
180 - Heading - General Subdivision (NR)
Full |
Concise
480 - See From Tracing - General Subdivision (R)
Full |
Concise
580 - See Also From Tracing - General Subdivision (R)
Full |
Concise
780 - Established Heading Linking Entry - General Subdivision (R)
Full |
Concise
First Indicator
Undefined
# - Undefined
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Second Indicator
180/480/580
-
Undefined
# - Undefined
780
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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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Tracing and linking subfields
$i - Reference instruction phrase (NR) [480/580]
$w - Control subfield (NR) [480/580/780]
$0 - Record control number (R) [580/780]
$2 - Source of heading or term (NR) [780]
$5 - Institution to which field applies (R) [480/580/780]
$6 - Linkage (NR)
$8 - Field link and sequence number (R)
| Subject subdivision portion
$v - Form subdivision (R)
$x - General subdivision (R)
$y - Chronological subdivision (R)
$z - Geographic subdivision (R)
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GUIDELINES FOR APPLYING CONTENT DESIGNATORS
Content designators identify the subelements occurring in general subdivision headings
constructed according to generally accepted thesaurus-building conventions (e.g.,
Library of Congress Subject Headings, Medical Subject Headings). A general
subdivision may be a topical or language term that is used as a subdivision portion of
an extended subject or index term access field in bibliographic records. A topical or
language term that is used as the lead element of an established heading record is
contained in a 150 (Heading-Topical Term) field.
Only generally-applicable content designators are described in full in this section. A
small number of content designators with field-specific instructions are described in
the Tracings and References-General Information section (for field 480 and 580)
and the 7XX Heading Linking Entries-General Information section (for field
780).
■ INDICATORS
First Indicator - Undefined Undefined and contains a blank (#).
Second Indicator In fields 180, 480, and 580, the second indicator position is undefined and
contains a blank (#). For field 780, the second indicator position contains one of
the values described in the
7XX Heading Linking Entries-General
Information section.
■ SUBFIELD CODES
$i - Reference instruction phrase [480/580]Reference instruction phrase other than those that may be system generated from
the field tag or from the codes defined for subfield $w (Control subfield).
Subfield $i is appropriate only in field 480 and 580. Guidelines for applying
subfield $i are provided in the Tracings and References-General
Information section.
$v - Form subdivision Designates a specific kind or genre of material as defined by the thesaurus being
used. Subfield $v is appropriate in an X80 field only when a form subject
subdivision is added to a general subdivision to form an extended heading.
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| 180 |
##$xRussian$vDictionaries |
$w - Control subfield [480/580/780]Codes in one or more character positions defined to control the display of
information and specify relationships, restrictions, and status. Subfield $w is
appropriate only in field 480, 580, and 780. Character position definitions and
guidelines for applying the codes defined for subfield $w in field 480 and 580 are
provided in the Tracings and References-General Information section.
Character position definitions and guidelines for field 780 are in the 7XX
Heading Linking Entries-General Information section.
$x - General subdivision Topical or language subdivision term.
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| 180 |
##$xPolitical aspects |
| 180 |
##$xRhetoric$xAbility testing |
| 180 |
##$xArabic |
$y - Chronological subdivision Subdivision term that represents a period of time. Subfield $y is appropriate in
an X80 field only when a chronological subdivision is added to a general
subdivision to form an extended subdivision heading.
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| 180 |
##$xCivilization$y16th century |
| 180 |
##$xHistory$y18th century$xExhibitions |
| 180 |
##$xHistory of doctrines$yEarly Church, ca. 30-600 |
$z - Geographic subdivision Appropriate in an X80 field only when a geographic subdivision is added to a
general subdivision to form an extended subdivision heading.
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| 180 |
##$xBoundaries$zCanada |
| 180 |
##$xNuclear reactor safety$y1975-1985$zUnited States |
| 180 |
##$xCampaigns$zTunisia |
$0 - Record control number [580/780]
$2 - Source of heading or term [780]Code that identifies the source of a heading or term when the second indicator
position contains value 7. Subfield $2 is appropriate only in field 780.
Guidelines for applying subfield $2 are provided in the
7XX Heading Linking
Entries—General Information section.
$5 - Institution to which field applies [480/580/780]
$8 - Field link and sequence number
INPUT CONVENTIONS
Punctuation - Punctuation of the subelements of a heading is generally dictated by subject heading
system/thesaurus rules. These input conventions clarify MARC punctuation practices. An
X80 field does not end with a mark of punctuation unless the field ends with an
abbreviation or data that ends with a mark of punctuation.
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| 180 |
##$xSalaries, etc. |
| 180 |
##$xEconomic conditions$y1960- |
Spacing - No spaces are used in initialisms.
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| 180 |
##$xHistory$y332-30 B.C. |
One space is used between the final period of an abbreviated term and a word or numeral
that follows.
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| 180 |
##$xHistory$yEarly church, ca. 30-600 |
Display Constant
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[dash associated with the content of subfield $v, $x, $y, and $z] |
Dash (-) that precedes a subdivision in an extended heading is not carried in the MARC
record. It may be system generated as a display constant associated with the content of
subfield $v, $x, $y, and $z.
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Content designated field :
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| 180 |
##$xEconomic conditions$y1960-
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Display example:
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Economic conditions-1960-
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