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diff --git a/src/xmlpatterns/iterators/qunioniterator.cpp b/src/xmlpatterns/iterators/qunioniterator.cpp
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+++ b/src/xmlpatterns/iterators/qunioniterator.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtXmlPatterns module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qitem_p.h"
+
+#include "qunioniterator_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+UnionIterator::UnionIterator(const Item::Iterator::Ptr &it1,
+                             const Item::Iterator::Ptr &it2) : m_it1(it1),
+                                                               m_it2(it2),
+                                                               m_position(0),
+                                                               m_node1(m_it1->next()),
+                                                               m_node2(m_it2->next())
+{
+    Q_ASSERT(m_it1);
+    Q_ASSERT(m_it2);
+}
+
+Item UnionIterator::next()
+{
+    ++m_position;
+    if(m_node1 && m_node2)
+    {
+        if(m_node1.asNode().model() != m_node2.asNode().model())
+        {
+            m_current = m_node1;
+            m_node1 = m_it1->next();
+            return m_current;
+        }
+
+        switch(m_node1.asNode().compareOrder(m_node2.asNode()))
+        {
+            case QXmlNodeModelIndex::Precedes:
+            {
+                m_current = m_node1;
+                m_node1 = m_it1->next();
+                return m_current;
+            }
+            case QXmlNodeModelIndex::Follows:
+            {
+                m_current = m_node2;
+                m_node2 = m_it2->next();
+                return m_current;
+            }
+            default:
+            {
+                m_current = m_node2;
+                m_node1 = m_it1->next();
+                m_node2 = m_it2->next();
+                return m_current;
+            }
+        }
+    }
+
+    if(m_node1)
+    {
+        m_current = m_node1;
+        m_node1 = m_it1->next();
+        return m_current;
+    }
+
+    if(m_node2)
+    {
+        m_current = m_node2;
+        m_node2 = m_it2->next();
+        return m_current;
+    }
+
+    m_current.reset();
+    m_position = -1;
+    return Item();
+}
+
+Item UnionIterator::current() const
+{
+    return m_current;
+}
+
+xsInteger UnionIterator::position() const
+{
+    return m_position;
+}
+
+Item::Iterator::Ptr UnionIterator::copy() const
+{
+    return Item::Iterator::Ptr(new UnionIterator(m_it1->copy(), m_it2->copy()));
+}
+
+QT_END_NAMESPACE