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.

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