080 Universal Decimal Classification Number (R)
| | | | |
Input Standards |
| Optional/Optional |
| 1st Indicator Type of edition |
 | No information provided |
| 0 | Full |
| 1 | Abridged |
| 2nd Indicator Undefined |
| | Undefined |
| Subfields (R=Repeatable NR=Nonrepeatable) | Input Standards |
| ‡a | Universal Decimal Classification number (NR) | Mandatory/Mandatory |
| ‡b | Item number (NR) | Required if applicable/Required if applicable |
| ‡x | Common auxiliary subdivision (R) | Required if applicable/Required if applicable |
| ‡2 | Edition identifier (NR) | Required if applicable/Required if applicable |
Definition | The Universal Decimal Classification (UDC) number. 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 science and technology (the 500 and 600 classes), and by its use of various symbols in addition to Arabic numbers and a single decimal point. Repeat field 080 to record multiple UDC numbers assigned to an item. |
1st indicator | Type of edition. Whether the class number is from the full or the abridged edition of the classification schedules. The actual edition number is contained in subfield ‡2. |
| | | | No information provided. | |
| | | 0 | Full. Class number is from a full edition. | |
| | | 1 | Abridged. Class number is from an abridged edition. | |
2nd Indicator | Undefined. The 2nd indicator position is undefined and contains a blank ( ). |
| | | | Undefined | |
Subfields | |
| ‡a Universal Decimal Classification number | The UDC number. |
| ‡b Item number | The item number portion of the UDC number. An item number is a Cutter, date, term, etc., added to a UDC number to distinguish items assigned the same classification number. |
| ‡x Common auxiliary subdivision | The number that qualifies the concept represented by the main UDC number. A common auxiliary subdivision, such as for form (e.g., dictionaries) is attached to a main UDC number preceded or delimited by a facet indicator. Commonly used facet indicators are parentheses, brackets, apostrophes, and hyphens. |
| ‡2 Edition identifier | The edition number, date, or other textual designation of the UDC edition used to compose the classification number. |
Printing | Field 080 does not print. Use field 098 to print UDC numbers. |
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