Field definition and scope:

Field 321 contains the former publication frequency of either an item or an update to an item.  It is used only when a current publication frequency is given in field 310 (Current Publication Frequency).

The phrase frequency varies may be used in field 321 when more than three past frequencies are known.  If subfield $a contains the phrase frequency varies, subfield $b contains the inclusive date for the frequencies.

The National level record requirement for this field is Optional.

Field 321 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 321

Former Publication Frequency

O

O

R

Indicator:

 

 

 

 

First

Undefined; contains a blank

M

 

 

Second

Undefined; contains a blank

M

 

 

 

 

 

 

 

Subfield code:

 

 

 

 

$a

Former publication frequency

M

O

NR

$b

Dates of former publication frequency

A

O

NR

$6

Linkage

A

O

NR

$8

Field link and sequence number

O

O

R

Input conventions:

Punctuation

Order of fields

Spacing

Temporary data

Related MARC fields or documents:

310  Current Publication Frequency

880  Alternate Graphic Representation

See also:

3XX  Physical Description, Etc. Fields

Variable Data Fields