080 Universal Decimal Classification Number

Field definition and scope:

Field 080 the classification number associated with a 1XX heading in an established heading record. The number is taken from the Universal Decimal Classification scheme.

The National level record requirement for this field is Optional.

Field 080 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 080	Universal Decimal Classification Number	O	R
Indicator:
First	Type of edition	M
#	No information provided	A
0	Full	A
1	Abridged	A

Second	Undefined; contains a blank	M

Subfield code:
$a	Universal Decimal Classification number	M	NR
$b	Item number	A	NR
$x	Common auxiliary subdivision	A	R
$0	Authority record control number or standard number		R
$1	Real World Object URI		R
$2	Edition identifier	M	NR
$6	Linkage	A	NR
$8	Field link and sequence number	O	R

Content designator history:

Field 080 - Universal Decimal Classification Number [new, 2009]

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

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

LC Guidelines:

080 Universal Decimal Classification Number