ble.  Records are stored in order by a comparison function assigned by a user.  It is possible to access each record with the cursor in ascending or descending order.  According to this mechanism, forward matching search for strings and range search for integers are realized.</p>

<p>As for database of fixed-length array, records are stored with unique natural numbers.  It is impossible to store two or more records with a key overlaps.  Moreover, the length of each record is limited by the specified length.