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diff --git a/include/gras/element.hpp b/include/gras/element.hpp
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+//
+// Copyright 2012 Josh Blum
+//
+// 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 3 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, see <http://www.gnu.org/licenses/>.
+
+#ifndef INCLUDED_GRAS_ELEMENT_HPP
+#define INCLUDED_GRAS_ELEMENT_HPP
+
+#include <gras/gras.hpp>
+#include <gras/io_signature.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+
+namespace gras
+{
+
+class ElementImpl;
+
+struct GRAS_API Element : boost::shared_ptr<ElementImpl>, boost::enable_shared_from_this<Element>
+{
+
+    //! Create an empty element
+    Element(void);
+
+    //! Creates a new element given the name
+    Element(const std::string &name);
+
+    /*!
+     * Create an element from a shared pointer to an element.
+     * Good for that factory function/shared ptr paradigm.
+     */
+    template <typename T>
+    Element(const boost::shared_ptr<T> &elem)
+    {
+        *this = elem->shared_to_element();
+    }
+
+    //! Convert a shared ptr of a derived class to an Element
+    Element &shared_to_element(void);
+
+    //! for internal use only
+    boost::weak_ptr<Element> weak_self;
+
+    //! An integer ID that is unique across the process
+    long unique_id(void) const;
+
+    //! Get the name of this element
+    std::string name(void) const;
+
+    //! get a canonical name for this element
+    std::string to_string(void) const;
+
+    void set_output_signature(const gras::IOSignature &sig);
+
+    void set_input_signature(const gras::IOSignature &sig);
+
+    const gras::IOSignature &input_signature(void) const;
+
+    const gras::IOSignature &output_signature(void) const;
+
+};
+
+} //namespace gras
+
+#endif /*INCLUDED_GRAS_ELEMENT_HPP*/