Understanding Sun Master Index Configuration Options

OneExactMatch

This parameter specifies logic for assumed matches. If OneExactMatch is set to true and there is more than one record above the match threshold, then none of the records are considered an assumed match and all are flagged as potential duplicates. If OneExactMatch is set to false and there is more than one record above the match threshold, then the record with the highest matching weight is considered an assumed match and the rest are flagged as potential duplicates.