| First Indicator | Second Indicator |
|---|---|
| Type of edition # - No information provided 0 - Full 1 - Abridged |
Undefined # - Undefined |
| Subfield Codes | |
|---|---|
|
|
Number taken from the Universal Decimal Classification scheme.
The Universal Decimal Classification was developed from the Dewey Decimal Classification (DDC) scheme beginning in 1895. In the intervening years, the two systems have become very different in arrangement and philosophy. The UDC may be distinguished from the DDC by its extensive expansions, especially in classes 5 and 6 (science and technology), and by its use of various symbols in addition to Arabic numbers and a single decimal point. Field 080 is repeated to record multiple UDC numbers assigned to an item.
First Indicator - Type of edition
Whether the classification number is from the full or the abridged edition of the classification schedules. The actual edition number is contained in subfield $2.
Class number is from a full edition.
Class number is from an abridged edition.
Second Indicator - Undefined
Undefined and contains a blank (#).
$a - Universal Decimal Classification number
| 080 | ##$a001.81$2[edition information] | ||||||||
| 080 | ##$a971.1/.2 | ||||||||
| 080 | ##$a631.321:631.411.3$2[edition information] | ||||||||
$b - Item number
Item number portion of the UDC number. An item number is a Cutter, date, term, etc. added to a classification number to distinguish one item from any other assigned the same classification number.
$x - Common auxiliary subdivision
Number that qualifies the concept represented by the main UDC number.
Common auxiliary subdivisions, such as those for form (e.g., dictionaries), are attached to a main UDC number preceded or delimited by some kind of facet indicator. Examples of commonly used subdivision delimiters are parentheses, brackets, an apostrophe, or a hyphen.
| 080 | ##$a821.113.1$x(494)$2[edition information] | ||||||||
| 080 | ##$a94$x(474)$x”19"$x(075)$2[edition information] | ||||||||
$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.
$2 - Edition identifier
Edition number, date, or other textual designation of the edition of UDC used to compose the classification number.
| 080 | ##$a82:111.852$21993 | ||||||||
| 080 | ##$a821.113.4-14$21998 | ||||||||
$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.
Prior to 2009, indicator 1 was undefined.