Library of Congress >> MARC >> Authority >> 1XX,3XX  >> 150

150 - Heading-Topical Term (NR)


MARC 21 Authority - full
July 2022

First Indicator Second Indicator
Undefined
# - Undefined

Undefined
# - Undefined


Subfield Codes
  • $a - Topical term or geographic name entry element (NR)
  • $b - Topical term following geographic name entry element (NR)
  • $g - Miscellaneous information (R)
  • $v - Form subdivision (R)
  • $x - General subdivision (R)
  • $y - Chronological subdivision (R)
  • $z - Geographic subdivision (R)
  • $6 - Linkage (NR)
  • $7 - Data provenance (R)
  • $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

In an established heading record, field 150 contains the established form of a topical term. In records for references and node labels, this field contains an unestablished form of a topical term.


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

Guidelines for applying the content designators defined for field 150 and input conventions are given in the X50 Topical Terms-General Information section.

EXAMPLES

150 ##$aCatalogue . . .
150 ##$abiographies by form
150 ##$aJohn, the Baptist, Saint, in the Koran
150 ##$aBible and atheism
150 ##$aGreece in textbooks
150 ##$aHurricane Flora, 1963
150 ##$aSalvation$xPrayer-books and devotions$xEnglish, [French, German, etc.]$xHistory and criticism
150 ##$aEnglish language$yMiddle English, 1100-1500$xGrammar
150 ##$aDrama$y17th century
150 ##$aGeology, Stratigraphic$yCarboniferous
150 ##$aFrench language$yEarly modern, 1500-1700$vGlossaries, vocabularies, etc.
150 ##$aEtching, Spanish$y18th century
150 ##$aÜberhaupt (The German word)
150 ##$aLa Plata dolphin
150 ##$aAfrihili (Artificial language)

Library of Congress >> MARC >> Authority >> 1XX,3XX  >> 150
(07/07/2022)
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