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diff --git a/src/metadata.h b/src/metadata.h
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+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef METADATA_HEADER
+#define METADATA_HEADER
+
+#include "irr_v3d.h"
+#include <iostream>
+#include <vector>
+#include "util/string.h"
+
+/*
+	NodeMetadata stores arbitary amounts of data for special blocks.
+	Used for furnaces, chests and signs.
+
+	There are two interaction methods: inventory menu and text input.
+	Only one can be used for a single metadata, thus only inventory OR
+	text input should exist in a metadata.
+*/
+
+class Inventory;
+class IItemDefManager;
+
+class Metadata
+{
+public:
+	void clear();
+	bool empty() const;
+
+	// Generic key/value store
+	std::string getString(const std::string &name, u16 recursion = 0) const;
+	void setString(const std::string &name, const std::string &var);
+	// Support variable names in values
+	std::string resolveString(const std::string &str, u16 recursion = 0) const;
+	const StringMap &getStrings() const
+	{
+		return m_stringvars;
+	}
+private:
+	StringMap m_stringvars;
+};
+
+#endif