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diff --git a/src/scxml/datamodel.h b/src/scxml/datamodel.h
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+/****************************************************************************
+ **
+ ** Copyright (c) 2015 Digia Plc
+ ** For any questions to Digia, please use contact form at http://qt.digia.com/
+ **
+ ** All Rights Reserved.
+ **
+ ** NOTICE: All information contained herein is, and remains
+ ** the property of Digia Plc and its suppliers,
+ ** if any. The intellectual and technical concepts contained
+ ** herein are proprietary to Digia Plc
+ ** and its suppliers and may be covered by Finnish and Foreign Patents,
+ ** patents in process, and are protected by trade secret or copyright law.
+ ** Dissemination of this information or reproduction of this material
+ ** is strictly forbidden unless prior written permission is obtained
+ ** from Digia Plc.
+ ****************************************************************************/
+
+#ifndef DATAMODEL_H
+#define DATAMODEL_H
+
+#include <QtScxml/executablecontent.h>
+
+#include <QVariant>
+#include <QVector>
+
+QT_BEGIN_NAMESPACE
+
+namespace Scxml {
+
+class ScxmlEvent;
+class StateMachine;
+
+#if defined(Q_CC_MSVC) || defined(Q_CC_GNU)
+#pragma pack(push, 4) // 4 == sizeof(qint32)
+#endif
+struct EvaluatorInfo {
+    ExecutableContent::StringId expr;
+    ExecutableContent::StringId context;
+};
+
+struct AssignmentInfo {
+    ExecutableContent::StringId dest;
+    ExecutableContent::StringId expr;
+    ExecutableContent::StringId context;
+};
+
+struct ForeachInfo {
+    ExecutableContent::StringId array;
+    ExecutableContent::StringId item;
+    ExecutableContent::StringId index;
+    ExecutableContent::StringId context;
+};
+#if defined(Q_CC_MSVC) || defined(Q_CC_GNU)
+#pragma pack(pop)
+#endif
+
+typedef qint32 EvaluatorId;
+enum { NoEvaluator = -1 };
+
+class NullDataModel;
+class EcmaScriptDataModel;
+class SCXML_EXPORT DataModel
+{
+    Q_DISABLE_COPY(DataModel)
+
+public:
+    class ForeachLoopBody
+    {
+    public:
+        virtual ~ForeachLoopBody();
+        virtual bool run() = 0;
+    };
+
+public:
+    DataModel();
+    virtual ~DataModel();
+
+    StateMachine *stateMachine() const;
+    void setTable(StateMachine *stateMachine);
+
+    virtual void setup() = 0;
+
+    virtual QString evaluateToString(EvaluatorId id, bool *ok) = 0;
+    virtual bool evaluateToBool(EvaluatorId id, bool *ok) = 0;
+    virtual QVariant evaluateToVariant(EvaluatorId id, bool *ok) = 0;
+    virtual void evaluateToVoid(EvaluatorId id, bool *ok) = 0;
+    virtual void evaluateAssignment(EvaluatorId id, bool *ok) = 0;
+    virtual bool evaluateForeach(EvaluatorId id, bool *ok, ForeachLoopBody *body) = 0;
+
+    virtual void setEvent(const ScxmlEvent &event) = 0;
+
+    virtual QVariant property(const QString &name) const = 0;
+    virtual bool hasProperty(const QString &name) const = 0;
+    virtual void setStringProperty(const QString &name, const QString &value, const QString &context,
+                                   bool *ok) = 0;
+
+    virtual NullDataModel *asNullDataModel();
+    virtual EcmaScriptDataModel *asEcmaScriptDataModel();
+
+private:
+    class Data;
+    Data *d;
+};
+
+} // namespace Scxml
+
+QT_END_NAMESPACE
+
+#endif // DATAMODEL_H