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class QueryResultIterator
          {
          public:
            QueryResultIterator( const QueryResult& list, TripleService* service );
            ~QueryResultIterator();
 
            /**
             * \return The total number or result statements
             *
             * \see QueryResult::count
             */
            int count() const;
 
            /**
             * \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();
            

}