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diff --git a/ingen/shared/LV2URIMap.hpp b/ingen/shared/LV2URIMap.hpp
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+/* This file is part of Ingen.
+ * Copyright 2008-2011 David Robillard <http://drobilla.net>
+ *
+ * Ingen 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.
+ *
+ * Ingen 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 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 St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef INGEN_SHARED_LV2URIMAP_HPP
+#define INGEN_SHARED_LV2URIMAP_HPP
+
+#include <map>
+#include <utility>
+
+#include <boost/utility.hpp>
+
+#include "ingen/shared/LV2Features.hpp"
+#include "lv2/lv2plug.in/ns/ext/uri-map/uri-map.h"
+#include "lv2/lv2plug.in/ns/ext/urid/urid.h"
+#include "raul/URI.hpp"
+
+namespace Ingen {
+namespace Shared {
+
+/** URI to Integer Map */
+class LV2URIMap : public boost::noncopyable {
+public:
+	LV2URIMap(LV2_URID_Map* map, LV2_URID_Unmap* unmap);
+	virtual ~LV2URIMap() {}
+
+	uint32_t    map_uri(const char* uri);
+	const char* unmap_uri(uint32_t urid);
+
+	class Feature : public LV2Features::Feature {
+	public:
+		Feature(const char* URI, void* data) {
+			_feature.URI  = URI;
+			_feature.data = data;
+		}
+
+		SharedPtr<LV2_Feature> feature(Shared::World*, Node*) {
+			return SharedPtr<LV2_Feature>(&_feature, NullDeleter<LV2_Feature>);
+		}
+
+	private:
+		LV2_Feature _feature;
+	};
+
+	class URIMapFeature : public Feature {
+	public:
+		URIMapFeature(LV2URIMap* map);
+
+	private:
+		LV2_URI_Map_Feature _feature_data;
+	};
+
+	class URIDMapFeature : public Feature {
+	public:
+		URIDMapFeature(LV2URIMap* map, LV2_URID_Map* urid_map);
+		LV2_URID map(const char* uri);
+	private:
+		static LV2_URID default_map(LV2_URID_Map_Handle h, const char* uri);
+		LV2_URID_Map _feature_data;
+	};
+
+	class URIDUnmapFeature : public Feature {
+	public:
+		URIDUnmapFeature(LV2URIMap* map, LV2_URID_Unmap* urid_unmap);
+		const char* unmap(const LV2_URID urid);
+	private:
+		static const char* default_unmap(LV2_URID_Map_Handle h, LV2_URID uri);
+		LV2_URID_Unmap _feature_data;
+	};
+
+	SharedPtr<URIMapFeature>    uri_map_feature()    { return _uri_map_feature; }
+	SharedPtr<URIDMapFeature>   urid_map_feature()   { return _urid_map_feature; }
+	SharedPtr<URIDUnmapFeature> urid_unmap_feature() { return _urid_unmap_feature; }
+
+	virtual uint32_t    uri_to_id(const char* map, const char* uri);
+	virtual const char* id_to_uri(const char* map, uint32_t id);
+
+	std::pair<bool, uint32_t> event_to_global(uint16_t event_id) const;
+	std::pair<bool, uint16_t> global_to_event(uint32_t global_id) const;
+
+private:
+	static uint32_t uri_map_uri_to_id(LV2_URI_Map_Callback_Data callback_data,
+	                                  const char*               map,
+	                                  const char*               uri);
+
+	static LV2_URID    urid_map(LV2_URID_Map_Handle handle, const char* uri);
+	static const char* urid_unmap(LV2_URID_Unmap_Handle handle, LV2_URID urid);
+
+	typedef std::map<uint16_t, uint32_t> EventToGlobal;
+	typedef std::map<uint32_t, uint16_t> GlobalToEvent;
+
+	SharedPtr<URIMapFeature>    _uri_map_feature;
+	SharedPtr<URIDMapFeature>   _urid_map_feature;
+	SharedPtr<URIDUnmapFeature> _urid_unmap_feature;
+	EventToGlobal               _event_to_global;
+	GlobalToEvent               _global_to_event;
+};
+
+} // namespace Shared
+} // namespace Ingen
+
+#endif // INGEN_SHARED_LV2URIMAP_HPP