Field definition and scope:

Field 073 contains a code specifying the topical term or geographic name with which a subdivision may be used in a particular thesaurus.  Field 073 is appropriate only in a subdivision record or an established heading and subdivision record.  The code may correspond to all or a portion of the subject category code contained in field 072 (Subject Category Code) in an established heading record for a topical term or geographic name.

The National level record requirement for this field is Optional.

Field 073 is NOT 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 073

Subdivision Usage

O

NR

Indicator:

 

 

 

First

Undefined; contains a blank

M

 

Second

Undefined; contains a blank

M

 

 

 

 

 

Subfield code:

 

 

 

$a

Subdivision usage

M

R

$z

Code source

M

NR

$6

Linkage

A

NR

$8

Field link and sequence number

O

R

 

See:  Example for this field.

LC Guidelines:

 073  Subdivision Usage

Related MARC fields or documents:

072  Subject Category Code

880  Alternate Graphic Representation

Source Codes for Vocabularies, Rules, and Schemes:

Subject Category Code Source Codes

See also:

0XX  Numbers and Codes

Variable Data Fields