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+# Database preparation process
+
+Download the main database from:
+ http://www17408ui.sakura.ne.jp/tatsum/database.html
+which is this file:
+ http://www17408ui.sakura.ne.jp/tatsum/database/VDRJ_Ver1_1_Research_Top60894.xlsx
+
+Then from the actual database sheet (sheet 5), take the columns:
+ lexeme, orthography, reading, part-of-speech (currently unused), "corrected frequency"
+
+Put the result in a CSV (say "database.csv") with 5 columns. It can be
+ascertained that the data from the spreadsheet does not contain commas in the
+selected columns, so the CSV conversion is safe.
+
+Then
+ $ cabal run process-database.hs -- database.csv