Information:
The 083 tag of the MARC authority format contains a
single Dewey Decimal Classification number or a number
span for the heading in the 1XX tag of the authority
record. The classification number may be qualified by
a descriptive term when the heading is represented
in more than one place in the Dewey Classification
schedules. Classification numbers are assigned from
the Dewey Decimal Classification and Relative
Index or the Abridged Dewey Decimal
Classification and Relative Index edited and
maintained by the Library of Congress and published by
Forest Press http://www.oclc.org/oclc/fp/.
Classification Numbers entered in an authority record
help the librarian determine what number to assign to
a similar new item.
The first indicator tells whether the classification
number comes from the Abridged or the Full edition of
the Dewey Decimal Classification.
The second indicator tells whether the Dewey
Classification number was assigned by the Library of
Congress or by another library or vendor.
Subfield a contains a single Dewey Decimal
Classification number or the beginning number of a
span. These are 3 digit numbers and can be followed by
a decimal point and other numbers. In long
classification numbers a slash (/) indicates where the
number may be shortened. In addition to the Dewey
Decimal numbers E, Fic, B, and 92 are used in this
subfield. Subfield b contains the classification
number ending number of a span.
Subfield c contains a descriptive term or phrase that
specifies the topic of the class number. This is
usually used to differentiate between two or more
class numbers associated with a heading.
Subfield 2 is used for the number of the edition of
the Dewey Decimal Classification. The Dewey Decimal
Classification and Relative Index is in its 21st
edition. The Abridged Dewey Decimal Classification
and Relative Index is now in its 13th edition.
Indicators
First Type of edition
0 Full edition
1 Abridged edition
Second Source of classification number
0 Assigned by LC
4 Assigned by agency other than LC
Subfields
a Classification number element-single number or
beginning number of span (NR)
b Classification number element-ending number of
span (NR)
c Explanatory term (NR)
2 Edition number (NR)
Examples:
151 _aUnited States
_xHistory
_yCivil War, 1861-1865
083 14 _a973.7
_213
151 _aScotland
083 00 _a941.1
_221
150 _aHemp
083 04 _a583.45
_cBotany
083 04 _a633.53
_cFiber crop
083 04 _a677.12
_cTextiles
_221
150 _aWorld War, 1939-1945
_vPersonal narratives
083 04 _a940.5481
_b940.5482
_221
130 0 _aBible
_vCommentaries
083 00 _a220.7
_213
150 _aValentine's Day
083 00 _a391.261/8
_213
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