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diff --git a/Source/WebCore/xml/XPathVariableReference.h b/Source/WebCore/xml/XPathVariableReference.h
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+++ b/Source/WebCore/xml/XPathVariableReference.h
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+/*
+ * Copyright 2005 Frerich Raabe <raabe@kde.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef XPathVariableReference_h
+#define XPathVariableReference_h
+
+#if ENABLE(XPATH)
+
+#include "XPathExpressionNode.h"
+
+namespace WebCore {
+
+    namespace XPath {
+
+        // Variable references are not used with XPathEvaluator.
+        class VariableReference : public Expression {
+        public:
+            VariableReference(const String& name);
+        private:
+            virtual Value evaluate() const;
+            virtual Value::Type resultType() const { ASSERT_NOT_REACHED(); return Value::NumberValue; }
+            String m_name;
+        };
+
+    }
+}
+
+#endif // ENABLE(XPATH)
+
+#endif // XPath_VariableReference_H