Library of Congress >> MARC >> Authority >> 01X-09X >> 072

072 - Subject Category Code (R)

MARC 21 Authority - Full

October 1999

First Indicator
Undefined
# - Undefined

Second Indicator
Code source
# - No information provided
0 - NAL subject category code list
7 - Source specified in subfield $2


Subfield Codes
$a - Subject category code (NR) $x - Subject category code subdivision (R) $2 - Code source (NR)	$6 - Linkage (NR) $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Code for the subject category that is associated with the 1XX field in an established heading record or a node label record.

Code indicates the relative position of the heading in a particular hierarchical arrangement in the thesaurus specified by the value in the second indicator position or in subfield $2 (Code source). Field 072 is repeated for each location of the heading in a specific thesaurus and for multiple subject category codes when a heading is common to different thesauri.

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

■ INDICATORS

First Indicator - Undefined

Undefined and contains a blank (#).

Second Indicator - Code source

Source of the subject category code.

# - No information provided

Source of the subject category code is the same as the subject heading system/thesaurus identified in 008/11 (Subject heading system/thesaurus).


008/11	c [code indicating MeSH]
150	##$aAtrophy
072	##$aC23.$x739.$x102

0 - NAL subject category code list

Source of the subject category code is AGRICOLA Subject Category Codes with Scope Notes that is maintained by NAL.


008/11	d [code indicating NAL]
150	##$aContamination and toxicology
072	#0$aQ200

7 - Source specified in subfield $2

■ SUBFIELD CODES

$a - Subject category code

Code for the broad subject category to which the heading belongs in a hierarchically-arranged thesaurus.


008/11	c [code indicating MeSH]
150	##$aLibraries, Hospital
072	##$aL1.$x346.$x596.$x463
072	##$aN2.$x278.$x354.$x560
072	##$aN4.$x452.$x442.$x468


008/09	e [node label record]
008/11	c [code indicating MeSH]
150	##$aNeoplastic Processes
072	##$aC4.$x697

$x - Subject category code subdivision

Level of specificity within the broader category coded in subfield $a.


008/11	c [code indicating MeSH]
151	##$aLibya
072	##$aZ1.$x58.$x266.$x513
072	##$aZ1.$x586

$2 - Code source

MARC code that identifies the thesaurus used to assign the subject category code when the second indicator position of this field contains value 7. Code from: Subject Category Code Source Codes.

$6 - Linkage

See description of this subfield in Appendix A: Control Subfields.

$8 - Field link and sequence number

See description of this subfield in Appendix A: Control Subfields.

Library of Congress >> MARC >> Authority >> 01X-09X >> 072

(03/03/2008)