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diff --git a/src/libs/modelinglib/qmt/infrastructure/uid.h b/src/libs/modelinglib/qmt/infrastructure/uid.h
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+++ b/src/libs/modelinglib/qmt/infrastructure/uid.h
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+/***************************************************************************
+**
+** Copyright (C) 2015 Jochen Becher
+** Contact: http://www.qt.io/licensing
+**
+** This file is part of Qt Creator.
+**
+** 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 http://www.qt.io/terms-conditions.  For further information
+** use the contact form at http://www.qt.io/contact-us.
+**
+** 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 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file.  Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, The Qt Company gives you certain additional
+** rights.  These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#ifndef QMT_UID_H
+#define QMT_UID_H
+
+#include "qmt_global.h"
+
+#include <QDataStream>
+#include <QUuid>
+#include <QMetaType>
+
+namespace qmt {
+
+class QMT_EXPORT Uid
+{
+public:
+    static const Uid invalidUid() { return Uid(QUuid()); }
+
+    Uid() : m_uuid(QUuid::createUuid()) { }
+    explicit Uid(const QUuid &uuid) : m_uuid(uuid) { }
+
+    bool isValid() const { return !m_uuid.isNull(); }
+    QUuid get() const { return m_uuid; }
+    void setUuid(const QUuid &uuid) { m_uuid = uuid; }
+
+    void clear() { m_uuid = QUuid(); }
+    void renew() { m_uuid = QUuid::createUuid(); }
+
+    QString toString() const { return m_uuid.toString(); }
+    void fromString(const QString &s) { m_uuid = QUuid(s); }
+
+private:
+    QUuid m_uuid;
+};
+
+inline uint qHash(const Uid &uid)
+{
+    return qHash(uid.get());
+}
+
+inline bool operator==(const Uid &lhs, const Uid &rhs)
+{
+    return lhs.get() == rhs.get();
+}
+
+inline bool operator!=(const Uid &lhs, const Uid &rhs)
+{
+    return !operator==(lhs, rhs);
+}
+
+inline QDataStream &operator<<(QDataStream &stream, const Uid &uid)
+{
+    return stream << uid.get();
+}
+
+inline QDataStream &operator>>(QDataStream &stream, Uid &uid)
+{
+    QUuid uuid;
+    stream >> uuid;
+    uid.setUuid(uuid);
+    return stream;
+}
+
+} // namespace qmt
+
+Q_DECLARE_METATYPE(qmt::Uid)
+
+#endif // QMT_UID_H