Extracts a table containing one row per unique document keyword found in the database.

Keywords are either provided by the authors of the papers, or generated by ISI automatically, indicated by the 'TYPE' row. See Load ISI File Into Database/KEYWORD for more details.

The 'OCCURRENCES_IN_DATASET' column counts the number of times each keyword occurs in the dataset. Keywords from authors are counted in a separate column than keywords generated by ISI.