087 Government Document Classification Number

Field definition and scope:

Field 087 contains a single government document classification number, number stem, or a number span associated with a 1XX heading in an established heading record. The classification number(s) may be qualified by explanatory information when the heading is represented in more than one place in the same classification scheme. Each classification number or number span associated with a heading is contained in a separate field 087.

The government document classification number is an agency-assigned data element. It is assigned by designated agencies in government classification programs.

The National level record requirement for this field is Optional.

Field 087 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 087	Government Document Classification Number	O	R
Indicator:
First	Number source	M
#	Source specified in subfield $2	A
0	Superintendent of Documents Classification System	A
1	Government of Canada Publications: Outline of Classification	A

Second	Undefined; contains a blank	M

Subfield code:
$a	Classification number element - single number or beginning number of span	M	NR
$b	Classification number element - ending number of span	A	NR
$c	Explanatory information	A	NR
$0	Authority record control number or standard number		R
$1	Real World Object URI		R
$2	Number source	A	NR
$6	Linkage	A	NR
$8	Field link and sequence number	O	R

Input conventions:

Punctuation

Superintendent of Documents Classification numbers

Government of Canada Publications: Outline of Classification numbers

Display constants

Content designator history:

Field 087 - Dewey Classification Number Assigned in Canada [redefined, 1997] [CAN/MARC only]: Field 087 was redefined in CAN/MARC to contain government classification numbers. Prior to redefinition, the first indicator values were: # (No edition information recorded), 0 (Full edition), and 1 (Abridged edition). The second indicator values were: 0 (Assigned by NLC) and 1 (Assigned by an agency other than NLC). The subfield codes were: $a (Dewey classification number - single number or beginning number of a range), $b (Dewey classification number - end number of a range), $c (Explanatory term), $2 (Source (i.e. edition number)), and $5 (Library to which class number applies).

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

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

LC Guidelines:

087 Government Document Classification Number