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diff --git a/src/xmlpatterns/expr/qprocessinginstructionconstructor.cpp b/src/xmlpatterns/expr/qprocessinginstructionconstructor.cpp
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+++ b/src/xmlpatterns/expr/qprocessinginstructionconstructor.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 "qcommonsequencetypes_p.h"
+#include "qpatternistlocale_p.h"
+#include "qnodebuilder_p.h"
+#include "qqnamevalue_p.h"
+
+#include "qprocessinginstructionconstructor_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+ProcessingInstructionConstructor::
+ProcessingInstructionConstructor(const Expression::Ptr &op1,
+                                 const Expression::Ptr &op2) : PairContainer(op1, op2)
+{
+}
+
+QString ProcessingInstructionConstructor::leftTrimmed(const QString &input)
+{
+    const int len = input.length();
+
+    for(int i = 0; i < len; ++i)
+    {
+        if(!input.at(i).isSpace())
+            return input.mid(i);
+    }
+
+    return QString(); /* input consists only of whitespace. All was trimmed. */
+}
+
+QString ProcessingInstructionConstructor::data(const DynamicContext::Ptr &context) const
+{
+    const Item name(m_operand1->evaluateSingleton(context));
+    const Item dataArg(m_operand2->evaluateSingleton(context));
+
+    if(dataArg)
+    {
+        /* Perform trimming before validation, to increase speed. */
+        const QString value(leftTrimmed(dataArg.stringValue()));
+
+        if(value.contains(QLatin1String("?>")))
+        {
+            context->error(QtXmlPatterns::tr("The data of a processing instruction cannot contain the string %1").arg(formatData("?>")),
+                              ReportContext::XQDY0026, this);
+            return QString();
+        }
+        else
+            return value;
+    }
+    else
+        return QString();
+}
+
+QXmlName ProcessingInstructionConstructor::evaluateTardata(const DynamicContext::Ptr &context) const
+{
+    const Item name(m_operand1->evaluateSingleton(context));
+    return context->namePool()->allocateQName(QString(), name.stringValue());
+}
+
+Item ProcessingInstructionConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const
+{
+    const NodeBuilder::Ptr nodeBuilder(context->nodeBuilder(QUrl()));
+
+    nodeBuilder->processingInstruction(evaluateTardata(context), data(context));
+
+    const QAbstractXmlNodeModel::Ptr nm(nodeBuilder->builtDocument());
+    context->addNodeModel(nm);
+
+    return nm->root(QXmlNodeModelIndex());
+}
+
+void ProcessingInstructionConstructor::evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const
+{
+    QAbstractXmlReceiver *const receiver = context->outputReceiver();
+
+    receiver->processingInstruction(evaluateTardata(context), data(context));
+}
+
+SequenceType::Ptr ProcessingInstructionConstructor::staticType() const
+{
+    return CommonSequenceTypes::ExactlyOneProcessingInstruction;
+}
+
+SequenceType::List ProcessingInstructionConstructor::expectedOperandTypes() const
+{
+    SequenceType::List result;
+    result.append(CommonSequenceTypes::ExactlyOneString);
+    result.append(CommonSequenceTypes::ZeroOrOneString);
+    return result;
+}
+
+Expression::Properties ProcessingInstructionConstructor::properties() const
+{
+    return DisableElimination | IsNodeConstructor;
+}
+
+ExpressionVisitorResult::Ptr
+ProcessingInstructionConstructor::accept(const ExpressionVisitor::Ptr &visitor) const
+{
+    return visitor->visit(this);
+}
+
+QT_END_NAMESPACE