class QueryResultIterator
          {
          public:
            QueryResultIterator( const QueryResult& list, TripleService* service );
            ~QueryResultIterator();
 
            /**
             * \return The to
            /**
             * \return A reference to the current results binding.
             */
            const QVector<Node>& current() const;
 
            /**
             * \return True if there is another statement after the current one.
             */
            bool hasNext() const;
 
            /**
             * Get the next statement.
             *
             * \return The next statement or an empty statement if hasNext() returns
             * false
             */
            const QVector<Node>& next() const;
 
            const Node& getBinding( const QString& column ) const;

            bool isBoolean();
            

}