X55 - Genre/Form Terms-General Information
MARC 21 Authority
October 2009
"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.
455 - See From Tracing - Genre/Form Term (R)
Full |
Concise
555 - See Also From Tracing - Genre/Form
Term (R)
Full |
Concise
755 - Established Heading Linking Entry - Genre/Form
Term (R)
Full |
Concise
First Indicator
Undefined
# - Undefined
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Second Indicator
155/455/555 - Undefined
# - Undefined
755 - 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 - Genre/form term (NR)
$i - Relationship information
(R) [455/555]
$w - Control subfield (NR) [455/555/755]
$0 - Record control number (R) [555/755]
$2 - Source of heading or term (NR) [755]
$4 - Relationship code (R)
[455/555]
$5 - Institution to which field applies (R)
[455/555/755]
$6 - Linkage (NR)
$8 - Field link and sequence number (R)
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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
genre/form term headings constructed according to generally
accepted thesaurus-building conventions (e.g., Art &
Architecture Thesaurus). Genre terms for textual materials
designate specific kinds of materials distinguished by the
style or technique of their intellectual contents; for example,
biographies, catechisms, essays, hymns, or reviews. Form terms
designate historically and functionally specific kinds of
materials as distinguished by an examination of their physical
character, characteristics of their intellectual content, or
the order of information within them; for example, daybooks,
diaries, directories, journals, memoranda, questionnaires,
syllabi, or time sheets. In the context of graphic materials,
genre headings denote categories of material distinguished by
vantage point, intended purpose, characteristics of the
creator, publication status, or method of representation.
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 455 and 555) and the
7XX Heading Linking Entries-General
Information section (for field 755).
■ INDICATORS
First Indicator - Undefined
Undefined and contains a blank (#).
Second Indicator
In fields 155, 455, and 555, the second indicator position
is undefined and contains a blank (#). For field 755, the
second indicator position contains one of the values
described in the
7XX Heading
Linking Entries-General Information section.
■ SUBFIELD CODES
$a - Genre/form term
May consist of more than one word.
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| 155 |
##$aBird's-eye views$y1874 |
| 155 |
##$aCartoons$y1952 |
$i - Relationship
information [455/555]
Designation of a relationship of the
entity in a 455 or 555 field to the 1XX entity in the
record or a textual reference instruction phrase 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 fields 455 and 555. Guidelines
for using 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 $v is appropriate
only when a form subject subdivision is added to a
genre/form term to form an extended heading.
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| 155 |
##$aCartoons$vPeriodicals |
$w - Control subfield [455/555/755]
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 455, 555, and 755. Character position definitions
and guidelines for applying the codes defined for subfield
$w in field 455 and 555 are provided in the Tracings
and References-General Information section. Character
position definitions and guidelines for field 755 are
provided in the 7XX Heading Linking Entries-General
Information section.
$x - General subdivision
Subject subdivision that is not more appropriately
contained in subfield $v (Form subdivision), subfield $y
(Chronological subdivision), or subfield $z (Geographic
subdivision). Subfield $x is appropriate in the X55 fields
only when a general topical subdivision is added to a main
term to form an extended heading.
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| 155 |
##$aDictionaries$xFrench$y18th century |
$y - Chronological subdivision
Subject subdivision that represents a period of time.
Subfield $y is appropriate in the X55 fields only when a
chronological subject subdivision is added to the main term
to form an extended heading.
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| 155 |
##$aCompetition drawings$y1984 |
$z - Geographic subdivision
Appropriate in the X55 fields only when a geographic
subject subdivision is added to a main term to form an
extended heading.
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| 155 |
##$aHymnals$zMassachusetts$y18th century |
$0 - Record control number
[555/755]
$2 - Source of heading or term
[755]
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 755. Guidelines for applying
subfield $2 are provided in the
7XX Heading Linking Entries-General
Information section.
$4 - Relationship code [455/555]
Contains in coded form the
designation of a
relationship of the entity in a 455 or 555 field to
the 1XX entity in the record. Guidelines for using subfield
$4 are provided in the
Tracings and References-General
Information section.
$5 - Institution to which field
applies[455/555/755]
$8 - Field link and sequence number
INPUT CONVENTIONS
Punctuation - Term followed by a subject
subdivision does not end with a mark of punctuation unless
the preceding term ends with an abbreviation, initial/letter,
open date, or other data that ends with in a mark of
punctuation.
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| 155 |
##$aPrayer
books$zRhode Island$y18th century |
Spacing - No spaces are used in initialisms,
acronyms, or abbreviations.
Display Constant
| - |
[dash
associated with the content of subfield $v, $x, $y, and
$z] |
Dash (-) that precedes a subdivision in an extended
subject heading is not carried in the MARC record. It may be
system generated as a display constant associated with the
content of subfields $v, $x, $y, and $z.
Content designated field:
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| 155 |
##$aAgenda$xWeekly |
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Display example:
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Agenda-Weekly-1980-1985
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CONTENT DESIGNATOR HISTORY
Prior to the definition of the X55 fields, X50 (Topical
Terms) fields were used for genre/form headings.
$i - Relationship information
[455/555] [REDEFINED, 2009]
$v - Record control number [755] [REDEFINED, 1995]
[USMARC only]
$0 - Record control number [555/755] [NEW, 1997]
$4 - Relationship code [455/555]
[NEW, 2009]