Dewey by the Numbers

Here’s a brief snapshot of the DDC 23 EN database (the database associated with the English-language version of DDC 23) as of 1 March 2018:

We are now presenting statistics on Relative Index terms and mapped headings in a more informative manner, showing both the number of terms/headings indexed or mapped to one or more Dewey numbers and the total number of assignments of terms/headings to Dewey numbers. (For example, if a Library of Congress subject heading is mapped to two Dewey numbers, it contributes 1 to the Headings column and 2 to the Assignments column.) Please note that starting this month, we've also used a new strategy for calculating the number of facets.