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diff --git a/src/state/Qt3DSStateTypes.h b/src/state/Qt3DSStateTypes.h
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+/****************************************************************************
+**
+** Copyright (C) 2013 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#pragma once
+#ifndef QT3DS_STATE_TYPES_H
+#define QT3DS_STATE_TYPES_H
+#include "Qt3DSState.h"
+#include "foundation/StringTable.h"
+#include "foundation/Qt3DSInvasiveLinkedList.h"
+#include "foundation/Qt3DSFlags.h"
+#include "foundation/Qt3DSDataRef.h"
+#include "foundation/Qt3DSContainers.h"
+#include "foundation/StringTable.h"
+#include "foundation/TaggedPointer.h"
+#include "foundation/Qt3DSVec2.h"
+#include "foundation/Qt3DSVec3.h"
+#include "foundation/Qt3DSAtomic.h"
+#include "foundation/Utils.h"
+
+namespace qt3ds {
+namespace state {
+    // Events, because they created both inside and outside
+    // the state system by various parties.
+    class IEvent : public NVRefCounted
+    {
+    protected:
+        virtual ~IEvent() {}
+    public:
+        virtual CRegisteredString GetName() const = 0;
+        // Optional type string for rtti.  No string means this is an opaque event
+        // that cannot be safely cast to any specific event type.
+        virtual CRegisteredString GetEventType() const { return CRegisteredString(); }
+    };
+
+    typedef NVScopedRefCounted<IEvent> TEventPtr;
+
+    DEFINE_INVASIVE_SINGLE_LIST(Data);
+
+    struct SDataModel
+    {
+        CRegisteredString m_Id;
+        const char8_t *m_Source;
+        const char8_t *m_Expression;
+        TDataList m_Data;
+
+        SDataModel()
+            : m_Source(nullptr)
+            , m_Expression(nullptr)
+        {
+        }
+    };
+
+    struct SData
+    {
+        CRegisteredString m_Id;
+        const char8_t *m_Source;
+        const char8_t *m_Expression;
+        SData *m_NextSibling;
+        SData()
+            : m_Source(nullptr)
+            , m_Expression(nullptr)
+            , m_NextSibling(nullptr)
+        {
+        }
+    };
+
+    IMPLEMENT_INVASIVE_SINGLE_LIST(Data, m_NextSibling);
+}
+}
+
+#endif