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diff --git a/xmltooling/ConcreteXMLObjectBuilder.h b/xmltooling/ConcreteXMLObjectBuilder.h
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+/*
+ *  Copyright 2001-2007 Internet2
+ * 
+ * Licensed 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file xmltooling/ConcreteXMLObjectBuilder.h
+ * 
+ * Factory interface for concrete XMLObjects, supporting default construction. 
+ */
+
+#ifndef __xmltooling_concxmlobjbuilder_h__
+#define __xmltooling_concxmlobjbuilder_h__
+
+#include <xmltooling/XMLObjectBuilder.h>
+
+namespace xmltooling {
+
+    /**
+     * A factory interface for obtaining XMLObjects.
+     * Subclasses MAY supply additional factory methods.
+     */
+    class XMLTOOL_API ConcreteXMLObjectBuilder : public XMLObjectBuilder
+    {
+    public:
+        virtual ~ConcreteXMLObjectBuilder() {}
+
+        /**
+         * Creates an empty XMLObject with a defaulted element name and/or type.
+         * 
+         * @return the empty XMLObject
+         */
+        virtual XMLObject* buildObject() const=0;
+
+    protected:
+        ConcreteXMLObjectBuilder() {}
+    };
+
+};
+
+#endif /* __xmltooling_concxmlobjbuilder_h__ */