Field definition and scope:

Field 072 contains a code for the subject category that is associated with the item.  Field 072 is repeated for multiple subject category codes.

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) and Minimal-level (MLR) record requirements, and designator repeatability, see table below:

Position

Description

NLR

MLR

Repeatability

Field 072

Subject Category Code

O

O

R

Indicator:

 

 

 

 

First

Undefined; contains a blank

M

 

 

 

 

 

 

 

Second

Code source

M

 

 

0

National Agricultural Library subject category code list

A

 

 

7

Source specified in subfield $2

A

 

 

 

 

 

 

 

Subfield code:

 

 

 

 

$a

Subject category code

M

O

NR

$x

Subject category code subdivision

A

O

R

$2

Source

A

O

NR

$6

Linkage

A

O

NR

$8

Field link and sequence number

O

O

R

Content designator history:

Second Indicator - Code source  (BK SE):  The definition of the second indicator position in 1981 broadened the scope of this field to include codes taken from any subject category code list.  Prior to that time, the field was used only for National Agricultural Library codes and the second indicator contained a # (blank) meaning undefined.

Related MARC fields or documents:

880  Alternate Graphic Representation

AGRICOLA Subject Category Codes with Scope Notes

Source Codes for Vocabularies, Rules, and Schemes:

Subject Category Code Source Codes

See also:

0XX  Numbers and Codes

Variable Data Fields