055 Library and Archives Canada Call Number

Field definition and scope:

Field 055 contains the call number for a series assigned in Canada if the institution has classified all or part of the series as a collected set, or with a main series, e.g., field 646 (Series Classification Practice), subfield $a, code c or m.

Field 055 may also contain the volumes/dates to which the number applies. Varying numbers for different ranges of volumes/dates within a series or different copies or sets are contained in separate 055 fields.

Note that call numbers/class numbers to be recorded in field 055 include those assigned from the Library of Congress classification schedules, and those from schedules specifically 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) record requirements, and designator repeatability, see table below:

Position	Description	NLR	Repeatability
Field 055	Library and Archives Canada Call Number	O	R
Indicator:
First	Undefined; contains a blank	M

Second	Source of call number	M
0	Assigned by LAC	A
4	Assigned by agency other than LAC	A

Subfield code:
$a	Classification number	M	NR
$b	Item number	A	NR
$d	Volumes/dates to which call number applies	O	NR
$0	Authority record control number or standard number		R
$1	Real World Object URI		R
$2	Number source		NR
$5	Institution to which field applies	O	R
$6	Linkage	A	NR
$8	Field link and sequence number	O	R

Input conventions:

Capitalization

Order

Content designator history:

Field 055 was redefined in 1997 and the name changed from Call Number Assigned in Canada (Series). At the time the field was redefined, the first indicator was made obsolete. Valid first indicator values had been 0 (Current call number) and 1 (Earlier call number). Second indicator value 1 (Call number assigned by contributing library) was also made obsolete at the time the field was redefined.

Field 055 - Library and Archives Canada Call Number [renamed, 2004]: Field 055 was renamed and all references to National Library of Canada and NLC replaced by Library and Archives Canada or LAC to reflect change in the institution's name.

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

Subfield $1 - Real World Object URI [new, 2017]

Subfield $2 - Number source [new, 2018]

LC Guidelines:

055 Library and Archives Canada Call Number