Authroity 448

Kezdőlap - A MARC21 authority formátum - Authority 4XX

First Indicator

Undefined

'#' - Undefined

Second Indicator

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 code (R)

$5 - Institution to which field applies (R)

$6 - Linkage (NR)

$8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

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.

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

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 code) 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