3.19 Overview to the Duplicate Bib Report

The MARC Bibliographic Duplicate report is a two step process. First, the report indexes each bibliographic record by the following values:

     - Call Number (tag 050, 060, 090, 096, or 099);  
     - Control Number (tag 001);  
     - LC (tag 010);  
     - ISBN (tag 020);  
     - ISSN (tag 022).

Notice that the report does not index by title (tag 245).

Second, the report outputs all fields which have a duplicate value. While creating the output, it then sorts these duplicates by normalized title. The end of the report is a listing duplicate title.