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亚洲太平洋地区 (Chinese Simplified) 更改
007 Introduction Field 007 Values Table 007 Electronic Resource 007 Globe 007 Map 007 Microform 007 Motion Picture 007 Nonprojected Graphic 007 Projected Graphic 007 Remote-sensing Image 007 Sound Recording 007 Tactile Material 007 Videorecording 010 LC Control No. 012 Terminal Display 013 Patent Control Information 015 National Bibliography No. 016 National Bibliographic Agency Control No. 017 Copyright/Legal Deposit No. 018 Copyright Article-Fee Code 019 OCLC Control No. Cross-Reference 020 ISBN 022 ISSN 024 Other Standard Identifier 025 Overseas Acquisition No. 026 Fingerprint Identifier 027 STRN 028 Publisher No. 029 Other System Control No. 030 CODEN Designation 031 Musical Incipits Information 032 Postal Registration No. 033 Date/Time/Place of an Event 034 Coded Cartographic Mathematical Data 035 System Control No. 036 Original Study No. 037 Source of Acquisition 040 Cataloging Source 041 Language Code 042 Authentication Code 043 Geographic Area Code 044 Country Code 045 Time Period 046 Special Coded Dates 047 Musical Composition Code 048 Number of Instruments/Voices Code 049 Local Holdings 050-099 Introduction 050 LC Call No. 051 LC Copy, Issue, Offprint Statement 052 Geographic Classification 055 Classification No.-Canada 060 NLM Call Number 061 NLM Copy Statement 066 Character Sets 070 NAL Call No. 071 NAL Copy Statement 072 Subject Category Code 074 GPO Item No. 079 OCLC Master Record Number

080 UDC No.

082 DDC No. 084 Other Classification No. 086 GovDoc Classification No. 088 Report No. 090 Local LC-type Call No. 092 Local Dewey Call No. 096 Local NLM-type Call No. 098 Other Classification Schemes 099 Local Free-Text Call No.

Contents   Fixed field   0xx   1xx   2xx   3xx   4xx   5xx   6xx   7xx   8xx   9xx

080  Universal Decimal Classification Number (R)

Input Standards

Optional/Optional
1st Indicator  Undefined
blank character  Undefined
2nd Indicator  Undefined
blank character  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

 Undefined. The 1st indicator position is undefined and contains a blank (blank character ).
blank character Undefined

2nd Indicator

 Undefined. The 2nd indicator position is undefined and contains a blank (blank character ).
blank character Undefined

Subfields
‡a Universal Decimal Classification number

The UDC number.

080 971.1/.2
‡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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