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diff --git a/debian/htdig/htdig-3.2.0b6/htsearch/QueryParser.h b/debian/htdig/htdig-3.2.0b6/htsearch/QueryParser.h
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+#ifndef _QueryParser_h_
+#define _QueryParser_h_
+
+//
+// QueryParser.h
+//
+// QueryParser: (abstract) root of the family of classes that create
+//              Query trees by analyzing query strings.
+//              The main public interface consists on Parse(),
+//              which does the job.
+//              The subclasses must provide a lexer.
+//              This class implements also the common behaviour needed to
+//              parse single words and phrases.
+//
+// Part of the ht://Dig package   <http://www.htdig.org/>
+// Copyright (c) 1995-2004 The ht://Dig Group
+// For copyright details, see the file COPYING in your distribution
+// or the GNU Library General Public License (LGPL) version 2 or later
+// <http://www.gnu.org/copyleft/lgpl.html>
+//
+// $Id: QueryParser.h,v 1.4 2004/05/28 13:15:24 lha Exp $
+//
+
+#include "QueryLexer.h"
+
+class Query;
+class FuzzyExpander;
+
+// abstract
+class QueryParser
+{
+public:
+	virtual ~QueryParser() {}
+
+	// do it
+	Query *Parse(const String &query_string);
+
+	// contains a diagnostic if Parse() failed
+	const String &Error() const
+		{ return error; }
+
+	// set a fuzzy word expansion policy 
+	static void SetFuzzyExpander(FuzzyExpander *x)
+		{ expander = x; }
+
+protected:
+	QueryParser() {}
+
+	// apply a syntax -- tbd by derived classes
+	virtual Query *ParseExpression() = 0;
+
+	// access to the lexer -- provided by children
+	virtual QueryLexer &Token() = 0;
+
+	// parse one (fuzzy) word
+	Query *ParseWord();
+
+	// parse an exact word
+	Query *ParseExactWord();
+
+	// parse a phrase
+	Query *ParsePhrase();
+
+	// set the error string on syntax error
+	void Expected(const String &what);
+
+	// the current fuzzy expansion policy if some
+	static FuzzyExpander *expander;
+
+private:
+	// syntax error if some
+	String error;
+};
+
+#endif