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diff --git a/include/ingen/client/BlockModel.hpp b/include/ingen/client/BlockModel.hpp
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+/*
+  This file is part of Ingen.
+  Copyright 2007-2015 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or 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 Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_CLIENT_BLOCKMODEL_HPP
+#define INGEN_CLIENT_BLOCKMODEL_HPP
+
+#include "ingen/Node.hpp"
+#include "ingen/client/ObjectModel.hpp"
+#include "ingen/client/PluginModel.hpp"
+#include "ingen/ingen.h"
+#include "ingen/types.hpp"
+
+#include <algorithm>
+#include <cstdint>
+#include <string>
+#include <vector>
+
+namespace Raul { class Path; }
+
+namespace ingen {
+
+class URIs;
+
+namespace client {
+
+class PortModel;
+
+/** Block model class, used by the client to store engine's state.
+ *
+ * @ingroup IngenClient
+ */
+class INGEN_API BlockModel : public ObjectModel
+{
+public:
+	BlockModel(const BlockModel& copy);
+	virtual ~BlockModel();
+
+	GraphType graph_type() const override { return Node::GraphType::BLOCK; }
+
+	using Ports = std::vector<SPtr<const PortModel>>;
+
+	SPtr<const PortModel> get_port(const Raul::Symbol& symbol) const;
+	SPtr<const PortModel> get_port(uint32_t index) const;
+
+	Node* port(uint32_t index) const override;
+
+	const URI&        plugin_uri()   const          { return _plugin_uri; }
+	const Resource*   plugin()       const override { return _plugin.get(); }
+	Resource*         plugin()                      { return _plugin.get(); }
+	SPtr<PluginModel> plugin_model() const          { return _plugin; }
+	uint32_t          num_ports()    const override { return _ports.size(); }
+	const Ports&      ports()        const          { return _ports; }
+
+	void default_port_value_range(const SPtr<const PortModel>& port,
+	                              float&                       min,
+	                              float&                       max,
+	                              uint32_t                     srate = 1) const;
+
+	void port_value_range(const SPtr<const PortModel>& port,
+	                      float&                       min,
+	                      float&                       max,
+	                      uint32_t                     srate = 1) const;
+
+	std::string label() const;
+	std::string port_label(const SPtr<const PortModel>& port) const;
+
+	// Signals
+	INGEN_SIGNAL(new_port, void, SPtr<const PortModel>)
+	INGEN_SIGNAL(removed_port, void, SPtr<const PortModel>)
+
+protected:
+	friend class ClientStore;
+
+	BlockModel(URIs& uris, URI plugin_uri, const Raul::Path& path);
+
+	BlockModel(URIs&                    uris,
+	           const SPtr<PluginModel>& plugin,
+	           const Raul::Path&        path);
+
+	explicit BlockModel(const Raul::Path& path);
+
+	void add_child(const SPtr<ObjectModel>& c) override;
+	bool remove_child(const SPtr<ObjectModel>& c) override;
+	void add_port(const SPtr<PortModel>& pm);
+	void remove_port(const SPtr<PortModel>& port);
+	void remove_port(const Raul::Path& port_path);
+	void set(const SPtr<ObjectModel>& model) override;
+
+	virtual void clear();
+
+	Ports             _ports;      ///< Vector of ports
+	URI               _plugin_uri; ///< Plugin URI (if PluginModel is unknown)
+	SPtr<PluginModel> _plugin;     ///< The plugin this block is an instance of
+
+private:
+	mutable uint32_t _num_values; ///< Size of _min_values and _max_values
+	mutable float*   _min_values; ///< Port min values (cached for LV2)
+	mutable float*   _max_values; ///< Port max values (cached for LV2)
+};
+
+} // namespace client
+} // namespace ingen
+
+#endif // INGEN_CLIENT_BLOCKMODEL_HPP