Field definition and scope:

Field 055 contains either a complete call number or a classification number that is assigned by Library and Archives Canada (LAC) or a library contributing to LAC, except for those numbers assigned from the National Library of Medicine classification system, the Universal Decimal Classification, and the Dewey Decimal Classification.  These latter numbers are input in fields 060 (National Library of Medicine Call Number), 080 (Universal Decimal Classification Number), and 082 (Dewey Decimal Classification Number), respectively.  Note that call numbers/class numbers to be recorded in field 055 include those assigned from the Library of Congress classification schedules, including those from schedules specially developed by Library and Archives Canada for Canadian history and literature.

The National level record requirement for this field is Optional.

Field 055 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 055

Classification Numbers Assigned in Canada

O

O

R

Indicator:

 

 

 

 

First

Existence in LAC collection

M

 

 

#

Information not provided

A

 

 

0

Work held by LAC

A

 

 

1

Work not held by LAC

A

 

 

 

 

 

 

 

Second

Type, completeness, source of class/call number

M

 

 

0

LC-based call number assigned by LAC

A

 

 

1

Complete LC class number assigned by LAC

A

 

 

2

Incomplete LC class number assigned by LAC

A

 

 

3

LC-based call number assigned by the contributing library

A

 

 

4

Complete LC class number assigned by the contributing library

A

 

 

5

Incomplete LC class number assigned by the contributing library

A

 

 

6

Other call number assigned by LAC

A

 

 

7

Other class number assigned by LAC

A

 

 

8

Other call number assigned by the contributing library

A

 

 

9

Other class number assigned by the contributing library

A

 

 

 

 

 

 

 

Subfield code:

 

 

 

 

$a

Classification number

M

O

NR

$b

Item number

A

O

NR

$0

Authority record control number or standard number

O

O

R

$2

Source of call/class number

A

O

NR

$6

Linkage

A

O

NR

$8

Field link and sequence number

O

O

R

Input conventions:

Punctuation

Spacing

Content designator history:

Subfield $0 - Authority record control number or standard number  [new, 2017]

Related MARC fields or documents:

060  National Library of Medicine Call Number

080  Universal Decimal Classification Number

082  Dewey Decimal Classification Number

Library of Congress Classification

LC Classification--Additions and Changes

Source Codes for Vocabularies, Rules, and Schemes:

Classification Scheme Source Codes

See also:

0XX  Numbers and Codes

Variable Data Fields