First indicator - Type of edition

#  No information provided

0  Full

1  Abridged

Second indicator:

#  Undefined


a  UDC number (NR)

b  Item number (NR)

x  Common auxiliary subdivision (R)

2  Edition identifier (NR)

6  Linkage (NR)

8  Field link and sequence number (R)

NOTE:  See MARC 21 Format for Bibliographic Data (080 Universal Decimal Classification Number) for code definitions not given below.


Field 080 contains the Universal Decimal Classification (UDC) number.  The UDC was developed from the Dewey Decimal Classification, but differs in arrangement and philosophy.  The UDC is 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.


$a  Universal Decimal Classification number.

080 ## 631.321:631.411.3

080 ## 301.162.2

080 ## 971.1/.2

$b  Item number.

Subfield $b contains the 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.

Subfield $x contains a common auxiliary subdivision, a 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 ## 821.113.1 $x (494) $2 [edition information]

$2  Edition identifier.

A number, date, or other textual designation of the UDC edition used to compose the classification number.

$6  Linkage.

For instructions on use of subfield $6, see field 880.

Related fields, etc.

080 Universal Decimal Classification Number  (MARC 21 Format for Bibliographic Data)

See also:

01X-09X  Numbers and Codes

Variable Data Fields

Section E.  MARC 21 Format for Serials as Applied Within CONSER

CONSER Editing Guide:  Contents