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diff --git a/indra/llui/llrngwriter.h b/indra/llui/llrngwriter.h
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+/** 
+ * @file llrngwriter.h
+ * @brief Generates Relax NG schema files from a param block
+ *
+ * $LicenseInfo:firstyear=2003&license=viewergpl$
+ * 
+ * Copyright (c) 2003-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LLRNGWRITER_H
+#define LLRNGWRITER_H
+
+#include "llinitparam.h"
+#include "llxmlnode.h"
+
+class LLRNGWriter : public LLInitParam::Parser
+{
+	LOG_CLASS(LLRNGWriter);
+public:
+	void writeRNG(const std::string& name, LLXMLNodePtr node, const LLInitParam::BaseBlock& block, const std::string& xml_namespace);
+	void addDefinition(const std::string& type_name, const LLInitParam::BaseBlock& block);
+
+	/*virtual*/ std::string getCurrentElementName() { return LLStringUtil::null; }
+
+	LLRNGWriter();
+
+private:
+	LLXMLNodePtr createCardinalityNode(LLXMLNodePtr parent_node, S32 min_count, S32 max_count);
+	void addTypeNode(LLXMLNodePtr parent_node, const std::string& type, const std::vector<std::string>* possible_values);
+
+	void writeAttribute(const std::string& type, const Parser::name_stack_t&, S32 min_count, S32 max_count, const std::vector<std::string>* possible_values);
+	LLXMLNodePtr	mElementNode;
+	LLXMLNodePtr	mChildrenNode;
+	LLXMLNodePtr	mGrammarNode;
+	std::string		mDefinitionName;
+
+	typedef std::pair<LLXMLNodePtr, std::set<std::string> >  attribute_data_t;
+	typedef std::map<std::string, attribute_data_t> elements_map_t;
+	typedef std::set<std::string> defined_elements_t;
+
+	defined_elements_t	mDefinedElements;
+	attribute_data_t	mAttributesWritten;
+	elements_map_t		mElementsWritten;
+};
+
+#endif //LLRNGWRITER_H