module ListFile {

	interface List {

		boolean add( in string username, in string password, in string start_time, in string end_time, in string description );
		string query( in string username, in string password, in string start_time, in string end_time );
		boolean delete( in string username, in string password, in long item_id );
		boolean clear( in string username, in string password );
	};
};