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diff --git a/src/nodemetadata.h b/src/nodemetadata.h
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+++ b/src/nodemetadata.h
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+/*
+Minetest-c55
+Copyright (C) 2010-2011 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 General Public License as published by
+the Free Software Foundation; either version 2 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 General Public License for more details.
+
+You should have received a copy of the GNU 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 NODEMETADATA_HEADER
+#define NODEMETADATA_HEADER
+
+#include "common_irrlicht.h"
+#include <string>
+#include <iostream>
+
+/*
+	Used for storing:
+
+	Oven:
+		- Item that is being burned
+		- Burning time
+		- Item stack that is being heated
+		- Result item stack
+	
+	Sign:
+		- Text
+*/
+
+class Inventory;
+
+class NodeMetadata
+{
+public:
+	typedef NodeMetadata* (*Factory)(std::istream&);
+
+	NodeMetadata();
+	virtual ~NodeMetadata();
+	
+	static NodeMetadata* deSerialize(std::istream &is);
+	void serialize(std::ostream &os);
+	
+	// This usually is the CONTENT_ value
+	virtual u16 typeId() const = 0;
+	virtual NodeMetadata* clone() = 0;
+	virtual void serializeBody(std::ostream &os) = 0;
+	virtual std::string infoText() {return "";}
+	virtual Inventory* getInventory() {return NULL;}
+	// This is called always after the inventory is modified, before
+	// the changes are copied elsewhere
+	virtual void inventoryModified(){}
+	// A step in time. Returns true if metadata changed.
+	virtual bool step(float dtime) {return false;}
+	virtual bool nodeRemovalDisabled(){return false;}
+
+protected:
+	static void registerType(u16 id, Factory f);
+private:
+	static core::map<u16, Factory> m_types;
+};
+
+class SignNodeMetadata : public NodeMetadata
+{
+public:
+	SignNodeMetadata(std::string text);
+	//~SignNodeMetadata();
+	
+	virtual u16 typeId() const;
+	static NodeMetadata* create(std::istream &is);
+	virtual NodeMetadata* clone();
+	virtual void serializeBody(std::ostream &os);
+	virtual std::string infoText();
+
+	std::string getText(){ return m_text; }
+	void setText(std::string t){ m_text = t; }
+
+private:
+	std::string m_text;
+};
+
+class ChestNodeMetadata : public NodeMetadata
+{
+public:
+	ChestNodeMetadata();
+	~ChestNodeMetadata();
+	
+	virtual u16 typeId() const;
+	static NodeMetadata* create(std::istream &is);
+	virtual NodeMetadata* clone();
+	virtual void serializeBody(std::ostream &os);
+	virtual std::string infoText();
+	virtual Inventory* getInventory() {return m_inventory;}
+
+	virtual bool nodeRemovalDisabled();
+	
+private:
+	Inventory *m_inventory;
+};
+
+class FurnaceNodeMetadata : public NodeMetadata
+{
+public:
+	FurnaceNodeMetadata();
+	~FurnaceNodeMetadata();
+	
+	virtual u16 typeId() const;
+	virtual NodeMetadata* clone();
+	static NodeMetadata* create(std::istream &is);
+	virtual void serializeBody(std::ostream &os);
+	virtual std::string infoText();
+	virtual Inventory* getInventory() {return m_inventory;}
+	virtual void inventoryModified();
+	virtual bool step(float dtime);
+
+private:
+	Inventory *m_inventory;
+	float m_step_accumulator;
+	float m_fuel_totaltime;
+	float m_fuel_time;
+	float m_src_totaltime;
+	float m_src_time;
+};
+
+/*
+	List of metadata of all the nodes of a block
+*/
+
+class InventoryManager;
+
+class NodeMetadataList
+{
+public:
+	~NodeMetadataList();
+
+	void serialize(std::ostream &os);
+	void deSerialize(std::istream &is);
+	
+	// Get pointer to data
+	NodeMetadata* get(v3s16 p);
+	// Deletes data
+	void remove(v3s16 p);
+	// Deletes old data and sets a new one
+	void set(v3s16 p, NodeMetadata *d);
+	
+	// A step in time. Returns true if something changed.
+	bool step(float dtime);
+
+private:
+	core::map<v3s16, NodeMetadata*> m_data;
+};
+
+#endif
+