Library of Congress >> MARC >> Authority >> 7XX  >> 748

748 - Established Heading Linking Entry-Chronological Term (R)


MARC 21 Authority - full
October 2014

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 - Chronological term (NR)
  • $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)
  • $2 - Source of heading or term (NR)
  • $4 - Relationship code (R)
  • $5 - Institution to which field applies (R)
  • $6 - Linkage (NR)
  • $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Chronological term that is equivalent to the 148 chronological term or 182 chronological subdivision heading 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 748 are the same as those defined for field 148 (Heading-Chronological Term), field 448 (See From Tracing-Chronological Term), and field 548 (See Also From Tracing-Chronological Term). Description, guidelines, and input conventions for shared content designators are given in the X48 Chronological Terms-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 code) in field 748 are given in the 7XX Heading Linking Entries-General Information section.

EXAMPLES

150 ##$aWar of the Mascates, Brazil, 1710-1714
748 #7$a1710-1714$wna$2fast
750 #0$aWar of the Mascates, Brazil, 1710-1714$0(DLC)sh#96009215#
750 #7$aWar of the Mascates$2fast$wna
751 #7$aBrazil$2fast$wna
150 ##$aFurniture$zUnited States$xHistory$y19th century
748 #7$a1800-1899$wnb$2fast
750 ##$aFurniture$xHistory$wnb$2fast
751 ##$aUnited States$wnb$2fast
150 ##$aBull Run, 2nd Battle of, Va., 1862
748 #7$a1862$wnb$2fast
750 ##$aBull Run, 2nd Battle$wnb$2fast
751 ##$aVirginia$zBull Run$wnb$2fast

Library of Congress >> MARC >> Authority >> 7XX  >> 748
(10/20/2014)
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