Library of Congress >> MARC >> Classification >> 70X-75X >> 754

754 - Index Term-Faceted Topical Terms (R)

MARC 21 Classification - full

December 2017

First Indicator	Second Indicator
Level of subject # - No information provided 0 - No level specified 1 - Primary 2 - Secondary	Undefined # - Undefined

Subfield Codes

$a - Focus term (R) $b - Non-focus term (R) $c - Facet/hierarchy designation (R) $v - Form subdivision (R) $y - Chronological subdivision (R) $z - Geographic subdivision (R)	$0 - Authority record control number or standard number (R) $1 - Real World Object URI (R) $2 - Source of heading or term (NR) $3 - Material specified (NR) $6 - Linkage (NR) $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Topical subject constructed from a faceted vocabulary. For each term found in the field, an identification is given as to the facet/hierarchy in the thesaurus from which the term came. In addition, identification is given as to which term is the focus term of the expression

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

Guidelines for applying the content designators for this field are provided in the MARC 21 Format for Bibliographic Data: field 654 (Subject Added Entry-Faceted Topical Term).

CONTENT DESIGNATOR HISTORY

$0 - Authority record control number [NEW, 2007]

$0 - Authority record control number [REDEFINED, 2010]

$1 - Real World Object URI [NEW, 2017]

Library of Congress >> MARC >> Classification >> 70X-75X >> 754

(12/18/2017)