             Permit duplicate data items in the tree, that is, insertion when the
                 key of the key/data pair being inserted already exists in the tree
                 will be successful.  The ordering of duplicates in the tree is
                 determined by the order of insertion unless the ordering is otherwise
                 specified by use of a cursor or a duplicate comparison function.     
             </p>
            <p>
                 It is an error to specify both <span clas