072 Subject Category Code (R) (Variable Data Field)
Field 072 contains a code for the subject category that is associated with the 1XX field in an established heading record or a node label record . The 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.
The National level record requirement for this field is Optional.
Field 072 is repeatable .
Guidelines for applying content designators:
For indicator and subfield code definitions and examples, National level (NLR) record requirements , and designator repeatability , see table below:
| Position | Description |
NLR |
Repeatability |
| Field 072 | Subject Category Code |
O |
R |
| Indicator: | |||
| First | Undefined; contains a blank |
M |
|
| Second | Code source |
M |
|
| # | No information provided |
A |
|
| 0 | National Agricultural Library subject category code list |
A |
|
| 7 | Source specified in subfield $2 |
A |
|
| Subfield code: | |||
| $a | Subject category code |
M |
NR |
| $x | Subject category code subdivision |
A |
R |
| $2 | Code source |
A |
NR |
| $6 | Linkage |
A |
NR |
| $8 | Field link and sequence number |
O |
R |
Related MARC fields or documents:
008/11 Subject heading system/thesaurus
880 Alternate Graphic Representation
AGRICOLA Subject Category Codes with Scope Notes
MARC Code Lists for Relators, Sources, Description Conventions
See also:
