084 Classification Scheme and Edition

Field definition and scope:

Field 084 contains information that identifies the authoritative classification scheme used to formulate the number caption in field 153 (Classification Number).

The field includes the edition that contains the classification number(s) and term(s) in the record. It also may indicate the edition title, date, and language of a particular version of the classification scheme. If a library creates its own record for a classification number maintained by another classification source, the classification scheme on which it is based is specified in field 084 and the library creating the record is identified in field 040 (Record Source).

Field 084 is NOT repeatable.

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, and designator repeatability, see table below:

Position	Description	Repeatability
Field 084	Classification Scheme and Edition	NR
Indicator:
First	Type of edition
0	Full
1	Abridged
8	Other

Second	Undefined; contains a blank

Subfield code:
$a	Classification scheme code	NR
$b	Edition title	NR
$c	Edition identifier	NR
$d	Source edition identifier	NR
$e	Language code	R
$f	Authorization	NR
$n	Variations	R
$q	Assigning agency	NR
$6	Linkage	NR
$8	Field link and sequence number	R

Scheme-specific conventions:

Dewey Decimal Classification

Content designator history:

Subfield $q - Assigning agency [new, 2008]