Library of Congress >> MARC >> Authority >> 1XX,3XX >> 148

148 - Heading-Chronological Term (NR)

MARC 21 Authority - full

July 2022

First Indicator	Second Indicator
Undefined # - Undefined	Undefined # - Undefined

Subfield Codes

$a - Chronological term (NR) $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 148 contains the established form of a chronological term. In records for references, this field contains an unestablished form of a chronological term.

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

Guidelines for applying the content designators defined for field 148 and input conventions are given in the X48 Chronological Terms-General Information section.

■ EXAMPLES

148	##$a1710-1714
148	##$a1500-1700
148	##$a1863

Library of Congress >> MARC >> Authority >> 1XX,3XX >> 148

(07/07/2022)