Field definition and scope:

Field 657 contains index terms that describe the activity or function of the community information entity if such information is not already indicated in another 6XX field.

Standard lists are used for the function terms and the list is identified in subfield $2 (Source of term).

Field 657 is repeatable.

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, and designator repeatability, see table below:

Position

Description

Repeatability

Field 657

Index Term - Function

R

Indicator:

 

 

First

Undefined; contains a blank

 

 

 

 

Second

Source of term

 

7

Source specified in subfield $2

 

 

 

 

Subfield code:

 

 

$a

Function

NR

$v

Form subdivision

R

$x

General subdivision

R

$y

Chronological subdivision

R

$z

Geographic subdivision

R

$0

Authority record control number

R

$2

Source of term

NR

$3

Materials specified

NR

$6

Linkage

NR

$8

Field link and sequence number

R

Input conventions:

Punctuation

Spacing

Display constant

Content designator history:

Subfield $0 - Authority record control number  [new, 2007]

Related MARC fields or documents:

880  Alternate Graphic Representation

Source Codes for Vocabularies, Rules, and Schemes:

Function Term Source Codes

See also:

6XX  Subject Access Fields

Variable Data Fields