Library of Congress >> MARC >> Authority >> Names and Terms  >> X47

X47 - Named Events-General Information


MARC 21 Authority
July 2022

"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 Format for Authority Data that contains abridged descriptions of every data element, along with examples.


First Indicator Second Indicator
Undefined
# - Undefined

147/447/547 - Undefined
# - Undefined

747 - Thesaurus
0 - Library of Congress Subject Headings
1 - Library of Congress Children's and Young Adults' Subject Headings
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



Subfield Codes

Main term portion

  • $a - Named event (NR)
  • $c - Location of named event (R)
  • $d - Date of named event (NR)
  • $g - Miscellaneous information (R)

Control subfields

  • $i - Relationship information (R)   [447/547/747]
  • $w - Control subfield (NR)   [447/547/747]
  • $0 - Authority record control number or standard number (R)   [547/747]
  • $1 - Real World Object URI (R)   [547/747]
  • $2 - Source of heading or term (NR)   [747]
  • $4 - Relationship (R)   [447/547/747]
  • $5 - Institution to which field applies (R)   [447/547/747]
  • $6 - Linkage (NR)
  • $7 - Data provenance (R)
  • $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)


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

Content designators identify the subelements occurring in named event headings constructed according to generally accepted thesaurus-building conventions (e.g., Faceted Application of Subject Terminology (FAST)). Named events are those which cannot be regarded as responsible agents, e.g., battles, earthquakes, famines, financial crises, fires, hurricanes, riots, strikes, volcanic eruptions, wars, etc.

Named events which can be regarded as responsible agents such as meetings or conferences as well as athletic contests, competitions, expeditions, expositions, fairs, festivals, sports events, tournaments, etc., are recorded in X11 fields.

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 fields 447 and 547) and the 7XX Heading Linking Entries-General Information section (for field 747).

INDICATORS

First Indicator - Undefined

Undefined and contains a blank (#).

Second Indicator

In fields 147, 447, and 547, the second indicator position is undefined and contains a blank (#). For field 747, the second indicator position contains one of the values described in the 7XX Heading Linking Entries-General Information section.

SUBFIELD CODES

$a - Named event

Name of an event which cannot be regarded as a responsible agent.

147 ##$aEruption of Vesuvius$c(Italy :$d79)

$c - Location of named event

Place name or a name of an institution where a named event occurred. Multiple adjacent locations are contained in a repeatable subfield $c.

447 ##$aBreed's Hill, Battle of$c(Boston, Massachusetts :$d1775)

$d - Date of named event

Date or time period related to a named event.

547 ##$aAmerican Civil War$d(1861-1865)

$g - Miscellaneous information

Data element that is not more appropriately contained in another defined subfield.

$i - Relationship information   [447/547/747]

Designation of a relationship of the entity in a 447, 547, or 747 field to the 1XX entity in the record or a textual reference instruction phrase. For fields 447 and 547 the phrase 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 447, 547, and 747. Guidelines for using subfield $i in fields 447 and 547 are provided in the Tracings and References-General Information section. Guidelines for using subfield $i in field 747 are provided in the 7XX Heading Linking Entries-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 the X47 fields only when a form subject subdivision is added to a main term to form an extended heading.

$w - Control subfield   [447/547/747]

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 fields 447, 547, and 747. Character position definitions and guidelines for applying the codes defined for subfield $w in fields 447 and 547 are provided in the Tracings and References-General Information section. Character position definitions and guidelines for field 747 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), and subfield $z (Geographic subdivision). Subfield $x is appropriate in the X47 fields only when a general topical subject subdivision is added to a main term to form an extended heading.

$y - Chronological subdivision

Subject subdivision that represents a period of time. Subfield $y is appropriate in the X47 fields only when a chronological subject subdivision is added to the main term to form an extended heading.

$z - Geographic subdivision

Appropriate in the X47 fields only when a geographic subject subdivision is added to a main term to form an extended heading.

$0 - Authority record control number or standard number   [547/747]

See description of this subfield in Appendix A: Control Subfields.

$1 - Real World Object URI   [547/747]

See description of this subfield in Appendix A: Control Subfields.

$2 - Source of heading or term   [747]

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 747. Guidelines for applying subfield $2 are provided in the 7XX Heading Linking Entries-General Information section.

$4 - Relationship   [447/547/747]

Code or URI that specifies the relationship from the entity described in the record to the entity referenced in the field. Guidelines for using subfield $4 in fields 447 and 547 are provided in the Tracings and References-General Information section. Guidelines for using subfield $4 in field 747 are provided in the 7XX Heading Linking Entries-General Information section.

$5 - Institution to which field applies   [447/547/747]

See description of this subfield in Appendix A: Control Subfields.

$6 - Linkage

See description of this subfield in Appendix A: Control Subfields.

$7 - Data provenance

See description of this subfield in Appendix H: Data Provenance Subfields.

$8 - Field link and sequence number

See description of this subfield in Appendix A: Control Subfields.


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 X47 field does not end with a mark of punctuation unless the field ends with an abbreviation, an initialism, or data that ends with a mark of punctuation.

Spacing - No spaces are used in initialisms, acronyms, or abbreviations. One space is used between preceding and succeeding initials if an abbreviation consists of more than a single letter.

Display Constant

- [dash associated with the content of subfield $v, $x, $y, and $z]

Dash (-) that precedes a subject 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 subfield $v, $x, $y, and $z.


CONTENT DESIGNATOR HISTORY

Field X47 - Named Events-General Information [NEW, 2016]
$1 - Real World Object URI [547/747] [NEW, 2017]
$4 - Relationship code [447/547/747] [RENAMED, 2017] [REDESCRIBED, 2017]

Subfield $4 was renamed and redescribed to allow for the recording of relationship URIs in addition to MARC and non-MARC codes.

$7 - Data provenance [NEW, 2022]

Library of Congress >> MARC >> Authority >> Names and Terms  >> X47
(07/07/2022)
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