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diff --git a/forms/source/xforms/pathexpression.hxx b/forms/source/xforms/pathexpression.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_FORMS_SOURCE_XFORMS_PATHEXPRESSION_HXX
+#define INCLUDED_FORMS_SOURCE_XFORMS_PATHEXPRESSION_HXX
+
+#include "computedexpression.hxx"
+
+#include <vector>
+
+// forward declaractions
+namespace com::sun::star
+{
+    namespace xml::dom
+    {
+        class XNodeList;
+        namespace events { class XEventListener; }
+    }
+}
+
+
+namespace xforms
+{
+
+/** PathExpression represents an XPath Expression and caches results */
+class PathExpression final : public ComputedExpression
+{
+public:
+    typedef std::vector<css::uno::Reference<css::xml::dom::XNode> > NodeVector_t;
+
+private:
+    /// the node-list result from the last bind (cached from mxResult)
+    NodeVector_t maNodes;
+
+    /// get expression for evaluation
+    OUString _getExpressionForEvaluation() const;
+
+
+public:
+    PathExpression();
+    ~PathExpression();
+
+    /// set the expression string
+    /// (overridden to do remove old listeners)
+    /// (also defines simple expressions)
+    void setExpression( const OUString& rExpression );
+
+
+    /// evaluate the expression relative to the content node.
+    void evaluate( const xforms::EvaluationContext& rContext );
+
+
+    // get the result of this expression as node/node list/...
+    css::uno::Reference<css::xml::dom::XNode> getNode() const;
+    const NodeVector_t& getNodeList() const { return maNodes;}
+    css::uno::Reference<css::xml::dom::XNodeList> getXNodeList() const;
+
+};
+
+} // namespace xforms
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */