MARC 21 Format for Authority Data: 747: Established Heading Linking Entry-Named Event (Network Development and MARC Standards Office, Library of Congress)

747 - Established Heading Linking Entry-Named Event (R)

MARC 21 Authority - full

December 2017

First Indicator	Second Indicator
Undefined # - Undefined	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

First Indicator

Second Indicator

Undefined
# - Undefined

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


Subfield Codes
$a - Named event (NR) $c - Location of named event (R) $d - Date of named event (NR) $g - Miscellaneous information (R) $i - Relationship information (R) $v - Form subdivision (R) $w - Control subfield (NR) /0 - Link display /1 - Replacement complexity $x - General subdivision (R) $y - Chronological subdivision (R)	$z - Geographic subdivision (R) $0 - Authority record control number or standard number (R) $1 - Real World Object URI (R) $2 - Source of heading or term (NR) $4 - Relationship (R) $5 - Institution to which field applies (R) $6 - Linkage (NR) $8 - Field link and sequence number (R)

Subfield Codes

$a - Named event (NR)
$c - Location of named event (R)
$d - Date of named event (NR)
$g - Miscellaneous information (R)
$i - Relationship information (R)
$v - Form subdivision (R)
$w - Control subfield (NR)
/0 - Link display
/1 - Replacement complexity
$x - General subdivision (R)
$y - Chronological subdivision (R)

$z - Geographic subdivision (R)
$0 - Authority record control number or standard number (R)
$1 - Real World Object URI (R)
$2 - Source of heading or term (NR)
$4 - Relationship (R)
$5 - Institution to which field applies (R)
$6 - Linkage (NR)
$8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Named event that is equivalent to the named event contained in the 147 field of the same record. It links headings within a system or from different thesauri or authority files.

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

Most of the content designators defined for field 747 are the same as those defined for field 147 (Heading-Named Event), field 447 (See From Tracing-Named Event), and field 547 (See Also From Tracing-Named Event). Description, guidelines, and input conventions for shared content designators are given in the X47 Named Events-General Information section.

Guidelines for applying the second indicator, subfield $w (Control subfield), subfield $2 (Source of heading or term), subfield $i (Relationship information), and subfield $4 (Relationship) in field 747 are given in the 7XX Heading Linking Entries-General Information section.

■ EXAMPLE

747

#7$aBunker Hill, Battle of$c(Boston, Massachusetts :$d1775)$2fast$0(OCoLC)fst01710024

CONTENT DESIGNATOR HISTORY

Field 747 - Established Heading Linking Entry-Named Event [NEW, 2016]

(12/18/2017)