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 (http://www.oclc.org/dewey/discussion/papers/SegmentationMarks.htm) and Representation of DDC in MARC 21 Bibliographic Format: An Update (http://www.oclc.org/dewey/news/conferences/2009MARC21.ppt).
Dewey number on LC copy 
Enter 
370.19'342 
370.19/342 
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.
Dewey number on LC copy 
Enter 
j574 
j574 
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 number on LC copy 
Enter 
[E] 
[E] 
[Fic] 
[Fic] 
Dewey numbers followed by 92 or 920. Use a second subfield ǂa for the 92 or 920.
Dewey number on LC copy 
Enter 
658.404 92 
658.404 ǂa 92 
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.
Dewey number on LC copy 
Enter 
942.082 [B] 
942.082 ǂa B 
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.
Dewey number on LC copy 
Enter 
*657.6 
657.6* ǂ2 15 
*735.29 735.42 
735.42 ǂa 735.29* 
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.
Dewey number on LC copy 
Enter 
081s 
081 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.
Dewey number on LC copy 
Enter 
(015.73) 
015.73 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.
Dewey number on LC copy 
Enter 
(015.73) 015.791 
015.73 s 
If the cataloging is for a nonserial publication, do not enter the number enclosed in parentheses. Enter only the other number.
Dewey number on LC copy 
Enter 
(015.73) 015.791 
015.791 
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 number on LC copy 
Enter 
222.14 
[Do not enter such numbers] 
222.14 (927.5) 
927.5 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 on LC copy 
Enter 
[320.9777] 
[320.9777] 
[016.3584] 012 
012 ǂa [016.3584] 
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.
Dewey number on LC copy 
Enter 
081s [370.19'342] 
081 s ǂa [370.19/342] 
