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

148 - Heading-Chronological Term (NR)


MARC 21 Authority - Full
October 2002

First Indicator
Undefined
# - Undefined

Second Indicator
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)
$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

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