Field definition and scope:

Field 645 contains a one-character alphabetic code that indicates a specific organization's tracing practice for a series named in the 1XX field of an established heading record for a series.  The code specifies whether the series is used as a series added entry or as an untraced series note in bibliographic records.  The field may also contain the volumes/dates and/or the institution/copy identification to which the tracing practice applies.

Field 645 is not used to indicate that a series-like phrase is not traced.

Varying tracing practices for different

--  ranges of volumes/dates within a series

--  copies or sets within the same organization

--  organizations

are contained in separate 645 fields.

The National level record requirement for this field is Optional.

Field 645 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 645

Series Tracing Practice

O

R

Indicator:

 

 

 

First

Undefined; contains a blank

M

 

Second

Undefined; contains a blank

M

 

 

 

 

 

Subfield code:

 

 

 

$a

Series tracing practice

M

NR

$d

Volumes/dates to which tracing practice applies

current - O

earlier   - M

NR

$5

Institution/copy to which field applies

M

R

$6

Linkage

A

NR

$8

Field link and sequence number

O

R

Input conventions:

Punctuation

Capitalization

Spacing

Order

Display constants

Content designator history:

First Indicator

Values  0 - Current numbering example  [obsolete, 1997]  [CAN/MARC only]

1 - Earlier numbering example  [obsolete, 1997]  [CAN/MARC only]

LC Guidelines:

 645  Series Tracing Practice

DCM Z1 Instructions:

 645  Series Tracing Practice

64X  Series Treatment

Related MARC fields or documents:

MARC Code List for Organizations

MARC 21 Format for Bibliographic Data:

4XX  Series Statement Fields

8XX  Series Added Entry Fields

Symbols and Interlibrary Loan Policies in Canada

See also:

64X  Series Treatment

Variable Data Fields