Library of Congress >> MARC >> Bibliographic >> 01X-09X  >> 055

055 - Classification Numbers Assigned in Canada (R)


MARC 21 Bibliographic - full
December 2017

First Indicator Second Indicator
Existence in LAC collection
# - Information not provided
0 - Work held by LAC
1 - Work not held by LAC

Type, completeness, source of class/call number
0 - LC-based call number assigned by LAC
1 - Complete LC class number assigned by LAC
2 - Incomplete LC class number assigned by LAC
3 - LC-based call number assigned by the contributing library
4 - Complete LC class number assigned by the contributing library
5 - Incomplete LC class number assigned by the contributing library
6 - Other call number assigned by LAC
7 - Other class number assigned by LAC
8 - Other call number assigned by the contributing library
9 - Other class number assigned by the contributing library


Subfield Codes
  • $a - Classification number (NR)
  • $b - Item number (NR)
  • $0 - Authority record control number or standard number (R)
  • $1 - Real World Object URI (R)
  • $2 - Source of call/class number (NR)
  • $6 - Linkage (NR)
  • $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Complete call number or a classification number assigned by Library and Archives Canada (LAC) or a library contributing to LAC.

Excludes 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.


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

First Indicator - Existence in LAC collection

Whether or not the item is contained in the Library and Archives Canada collection.

# - Information not provided

Used in any record input by an institution other than LAC.

055 #5$aHT154
0 - Work held by LAC
1 - Work not held by LAC

Second Indicator - Type, completeness, source of class/call number

Type of number involved (whether it is an LC class number, an LC-based call number, or a class/call number assigned from some other classification scheme), the completeness of the class number (for LC class numbers only), and whether the number was assigned by Library and Archives Canada or a contributing library

LC class number (second indicator value 1, 2, 4, or 5) is one that has been assigned using the Library of Congress Classification or LC Classification-Additions and Changes. An "incomplete" class number (value 2 or 5) lacks a subject Cutter number required by Library of Congress Classification.

"LC-based" call number (second indicator value 0 or 3) is one that has been assigned using the Library of Congress Classification or LC Classification-Additions and Changes and, in addition, the schedules for Canadian history (FC schedule), Canadian literature (PS 8000-8999), and Canadian law developed by Library and Archives Canada. The term does not include numbers from locally modified or expanded LC schedules.

For non-LC, non-LC-based call/class numbers (second indicator value 6, 7, 8, or 9), the source list or scheme used to assign the number may be identified by a code in subfield $2 (Source of call/class number).

0 - LC-based call number assigned by LAC
1 - Complete LC class number assigned by LAC
2 - Incomplete LC class number assigned by LAC

Number is followed by an asterisk (*).

055 12$aPS8575*
[Number lacks an author subdivision.]
3 - LC-based call number assigned by the contributing library
4 - Complete LC class number assigned by the contributing library
5 - Incomplete LC class number assigned by the contributing library

Number is followed by an asterisk (*).

055 #5$aHT154G*
6 - Other call number assigned by LAC

Call number (other than an LC, NLM, Universal Decimal, or Dewey) which has been assigned by LAC.

055 06$aK347.9444$bC5164
7 - Other class number assigned by LAC

Class number (other than an LC, NLM, Universal Decimal, or Dewey) which has been assigned by LAC. This value is not used.

8 - Other call number assigned by the contributing library

Call number (other than an LC, NLM, Universal Decimal, or Dewey) assigned by the contributing library.

055 18$aKF385 ZB5$bC6$2kfmod
9 - Other class number assigned by the contributing library

Class number (other than an LC, NLM, Universal Decimal, or Dewey) assigned by the contributing library.

SUBFIELD CODES

$a - Classification number

Classification number portion of the call number. Alternate call numbers are recorded in separate 055 fields.

055 01$aFC3099
055 02$aFC2949*
055 01$aHB31
055 00$aHB31$bS54fol.
[Multiple 055 fields; LC class number, and NLC call number.]

$b - Item number

Item number portion of the call number.

055 00$aF5050 .2$bT5
055 02$aFC2949*
055 00$aF5449 W4$bA28fol. Ref.
[Multiple 055 fields; Incomplete LC class number and NLC call number.]

$0 - Authority record control number or standard number

See description of this subfield in Appendix A: Control Subfields.

$1 - Real World Object URI

See description of this subfield in Appendix A: Control Subfields.

$2 - Source of call/class number

Source list or scheme from which the call/class number was assigned. Used only when the second indicator contains value 6 (Other call number assigned by LAC), 7 (Other class number assigned by LAC), 8 (Other call number assigned by the contributing library), or 9 (Other class number assigned by the contributing library).

Code from: Classification Scheme Source Codes.

055 18$aKF385 ZA2$b.T34 1989$2kfmod
[Call number assigned from KF Classification, Modified for Use in Canadian Law Libraries.]

$6 - Linkage

See description of this subfield in Appendix A: Control Subfields.

$8 - Field link and sequence number

See description of this subfield in Appendix A: Control Subfields.


INPUT CONVENTIONS

Punctuation - Field 055 does not end with a period.

Spacing - Any spaces that are desired as part of the call number must be input.


CONTENT DESIGNATOR HISTORY

$0 - Authority record control number or standard number [NEW, 2017]
$1 - Real World Object URI [NEW, 2017]

Library of Congress >> MARC >> Bibliographic >> 01X-09X  >> 055
(12/18/2017)
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