-/* $Id: filter.hpp,v 1.8 2005-10-31 09:40:18 marc Exp $
+/* $Id: filter.hpp,v 1.9 2005-11-03 14:45:15 adam Exp $
Copyright (c) 2005, Index Data.
%LICENSE%
#ifndef FILTER_HPP
#define FILTER_HPP
+#include <string>
#include <stdexcept>
#include <libxml/tree.h>