Record Type 

BIB 

Input Standards 

Required if applicable/Optional  
1st Indicator Type of edition  
No edition information recorded  
0  Full edition  
1  Abridged edition  
7  Other edition specified in subfield ǂ2  
2nd Indicator Source of classification number  
No information provided  
0  Assigned by LC  
4  Assigned by agency other than LC  
Subfields (R=Repeatable NR=Nonrepeatable)  Input Standards  
ǂa  Classification number (R)  Mandatory/Mandatory 
ǂb  Item number (NR)  Optional/Optional 
ǂm  Standard or optional designation (NR)  Mandatory/Mandatory 
ǂq  Assigning agency (NR)  Optional/Optional 
ǂ2  Edition number (NR)  Required if applicable/Required if applicable 
ǂ6  Linkage (NR)  System supplied/System supplied 
ǂ8  Field link and sequence number (R)  Optional/Optional 
Definition 
The Dewey Decimal call number assigned by the Library of Congress (LC), Library and Archives Canada (LAC), or other national agencies. Use field 082 or field 092 for Dewey numbers assigned by agencies other than LC, LAC, etc. Use field 082 if you are transcribing Dewey numbers from LC copy or Canadian CataloginginPublication (CIP) and to identify the edition of the Dewey Decimal Classification (DDC) from which the class number was derived. If you assign a Dewey Decimal Classification number according to the DDC schedules or to LC practice, use field 082 or field 092 with 2nd indicator 4. If the classification portion of your number does not conform to the DDC schedules, use field 099. 

Guidelines 

Transcribing Dewey numbers from LC copy  Use the following guidelines for entering Dewey number from LC copy. Segmentation (prime) marks. Since 1967 LC has divided Dewey class numbers into as many as three segments. LC uses prime marks to separate the segments. The prime marks indicate logical places to shorten a long class number if a library does not want the complete number. If you are transcribing a Dewey class number from LC copy, enter a slash instead of a prime mark. As of September 1, 2005, LC discontinued the practice of assigning segmentation marks (also referred to as prime marks or slash marks) to indicate the beginning of standard subdivisions in DDC numbers. The assignment of segmentation marks to indicate the end of abridged numbers, however, will continue. This means that any given DDC number will contain a maximum of one segmentation mark, and every segmentation mark can safely be interpreted as indicating the end of an abridged number. For more information see: Segmentation Marks in Dewey Numbers and Representation of DDC in MARC 21 Bibliographic Format: An Update.
Juvenile works. For works intended for a juvenile audience, a lowercase j is added as a prefix. The j prefix is not added to DDC numbers in records for juvenile textbooks.
Juvenile works with [E] or [Fic]. For some juvenile works, LC copy has [E] or [Fic] instead of a Dewey class number. Use field 082 for these designations, including the brackets.
Dewey numbers followed by 92 or 920. Use a second subfield ǂa for the 92 or 920.
Uppercase B in post1971 numbers. Since January 1971, LC has used an uppercase B to identify works as primarily biographical. If LC copy includes a Dewey number followed by B enclosed in parentheses or brackets, use a second subfield ǂa for the B. Do not enter the parentheses or brackets.
LC assigned Dewey numbers according to both the 14th and the 15th editions of the Dewey schedules. From January 1952November 1958, LC added an asterisk before numbers based on the 15th edition. If you are transcribing such a number, move the asterisk to the end of the number and add subfield ǂ2 15. If LC copy has two Dewey numbers and one is preceded by an asterisk, use the first subfield ǂa for the number without the asterisk. Use a second subfield ǂa for the other number and move the asterisk to the end of the number.
Series numbers. To indicate a series number, LC uses a lowercase s following a Dewey number. If you are transcribing such a number, enter the number, one space, and the lowercase s.
Parentheses indicating Dewey numbers assigned to a series. At one time, LC used parentheses to indicate a Dewey number assigned to the series. If you are transcribing such a number, do not enter the parentheses. Enter the number, one space, and a lowercase s.
Two Dewey numbers: one in parentheses, one not. If the cataloging is for a serial publication, do not enter the number outside the parentheses. Enter the other number, according to current practice for designating numbers assigned to series. Do not enter the parentheses. Enter the number, one space, and a lowercase s.
If the cataloging is for a nonserial publication, do not enter the number enclosed in parentheses. Enter only the other number.
Dewey numbers with minus signs. If LC preceded the Dewey number with a minus sign, do not enter that number. Some LC copy includes both a "minus" Dewey number and a Dewey number enclosed in parentheses. Do not enter the "minus" number. Enter the other number according to current practice for designating numbers assigned to series. Do not enter the parentheses. Enter the number, a blank space, and a lowercase s.
Dewey numbers in brackets. A Dewey number in brackets is an alternative classification number. If LC copy has one Dewey number enclosed in brackets, enter the number with brackets. If LC copy has two Dewey numbers, and one is bracketed, use the first subfield ǂa for the unbracketed number. Use a second subfield ǂa for the bracketed number.
Dewey number followed by lowercase s and a second number in brackets. Enter the first Dewey number according to current practice for numbers assigned to series. Enter the number, one space, and a lowercase s. Use a second subfield ǂa for the bracketed number. Enter the brackets.


Canadian CIP  If you are transcribing Canadian CIP, use field 082 for the Dewey class number assigned by LAC. Enter a C before the class number.


1st Indicator 
Type of edition. Indicates the edition from which the Dewey Decimal Classification is taken. Use subfield ǂ2 for the actual edition number. 









2nd Indicator 
Source of classification number. The source of the classification number. 







Subfields 

ǂa Classification number  The classification number portion of the call number.


ǂb Item number  The item number portion of the call number.


ǂm Standard or optional designation  Designates whether the classification number contained in the field is from the standard or optional part of the schedules or tables of the scheme identified by the 1st indicator and by subfield ǂ2. The following codes are used: a (standard) and b (optional). Standard or optional designation: If subfield ǂm is present, only one subfield ǂa should be coded, unless the value in subfield ǂm applies to all numbers in repeated occurrences of subfield ǂa. Otherwise, the field is repeated.


ǂq Assigning agency  The MARC organization code of the institution that assigned the classification number. See MARC Code List for Organizations.


ǂ2 Edition number  The edition number.


ǂ6 Linkage  Data that link fields when nonLatin script is entered. This subfield is system supplied and does not appear in OCLC online displays. Do not add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields. 

ǂ8 Field link and sequence number  For information about subfield ǂ8, see Control Subfields. 
This page last revised: April 17, 2019