Building Classification Numbers

Using the Dewey Decimal Classification System is not a difficult task, but it does take some careful attention to detail and careful reading of notes to determine the correct notation for an item being classified. Many times library staff may become confused about the use of the DDC because they do not carefully read and follow the instructions under many of the listings in the schedules.

When using the DDC, it is important to think in terms of significant digits. When we think of a Dewey classification number we think of three digits, perhaps followed by a decimal point and further digits. This is the end result of using the schedules, but in creating a number it is helpful to string together all of the necessary numbers, and then place the decimal point as the final step in the process. This is particularly true when using the tables to add specific details to the notations from the schedules.

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