MARC 21 Format for Authority Data: 448: See From Tracing-Chronological Term (Network Development and MARC Standards Office, Library of Congress)

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


Subfield Codes
$a - Chronological term (NR) $i - Relationship information (R) $v - Form subdivision (R) $w - Control subfield (NR) /0 - Special relationship /1 - Tracing use restriction /2 - Earlier form of heading /3 - Reference display $x - General subdivision (R) $y - Chronological subdivision (R)	$z - Geographic subdivision (R) $4 - Relationship (R) $5 - Institution to which field applies (R) $6 - Linkage (NR) $8 - Field link and sequence number (R)

Tracing for a chronological term see from reference.

Used in an established heading or established heading and subdivision record to trace a see from reference from a chronological term not used in an established heading.

Most of the content designators defined for field 448 are the same as those defined for field 148 (Heading-Chronological Term), field 548 (See Also From Tracing-Chronological Term), and field 748 (Established Heading Linking Entry-Chronological Term). Description, guidelines, and input conventions for shared content designators are given in the X48 Chronological Terms-General Information section.

Guidelines for using subfield $w (Control subfield), subfield $i (Relationship information), and subfield $4 (Relationship) in field 448 are given in the Tracings and References-General Information section.

■ EXAMPLES

148	##$a1800-1899
448	##$aNineteenth century

148	##$a1900-1999
448	##$aTwentieth century

448 - See From Tracing-Chronological Term (R)

FIELD DEFINITION AND SCOPE

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

■ EXAMPLES