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+/* This file is part of Ingen.
+ * Copyright 2007-2011 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_INTERFACE_NODE_HPP
+#define INGEN_INTERFACE_NODE_HPP
+
+#include <stdint.h>
+
+#include "ingen/GraphObject.hpp"
+
+namespace Ingen {
+
+class Port;
+class Plugin;
+
+/** A Node (or "module") in a Patch (which is also a Node).
+ *
+ * A Node is a unit with input/output ports, a process() method, and some other
+ * things.
+ *
+ * Purely virtual (except for the destructor).
+ *
+ * \ingroup interface
+ */
+class Node : public virtual GraphObject
+{
+public:
+	virtual uint32_t      num_ports()          const = 0;
+	virtual Port*         port(uint32_t index) const = 0;
+	virtual const Plugin* plugin()             const = 0;
+};
+
+} // namespace Ingen
+
+#endif // INGEN_INTERFACE_NODE_HPP