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diff --git a/ACE/ACEXML/common/Exception.h b/ACE/ACEXML/common/Exception.h
new file mode 100644
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+++ b/ACE/ACEXML/common/Exception.h
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+// -*- C++ -*-
+
+//=============================================================================
+/**
+ *  @file    Exception.h
+ *
+ *  $Id$
+ *
+ *  @author Nanbor Wang <nanbor@cs.wustl.edu>
+ */
+//=============================================================================
+
+#ifndef _ACEXML_EXCEPTION_H_
+#define _ACEXML_EXCEPTION_H_
+
+#include /**/ "ace/pre.h"
+#include "ACEXML/common/ACEXML_Export.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+#pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#include "ACEXML/common/XML_Types.h"
+
+/**
+ * @class ACEXML_Exception
+ *
+ * @brief ACEXML_Exception
+ *
+ * ACEXML_Exception is the base class for all ACEXML related exceptions.
+ * Since ACEXML currently does not support native exceptions, all
+ * exceptions should be thrown thru ACEXML_Env.
+ *
+ * @sa ACEXML_Env
+ */
+class ACEXML_Export ACEXML_Exception
+{
+public:
+
+  /// Destructor.
+  virtual ~ACEXML_Exception (void);
+
+  /// Throw the exception.
+  virtual void _raise (void) = 0;
+
+  /// Static narrow operation.
+  static ACEXML_Exception* _downcast (ACEXML_Exception* ex);
+
+  /// Return the exception type.  (for safe downcast.)
+  virtual const ACEXML_Char *id (void) const ;
+
+  /// Dynamically create a copy of this exception.
+  virtual ACEXML_Exception *duplicate (void) const = 0;
+
+  /// Check whether this is an exception of type specified by <name>.
+  virtual int is_a (const ACEXML_Char *name);
+
+  /// Print out exception using ACE_DEBUG.
+  virtual void print (void) const = 0;
+
+protected:
+  /// Default constructor.
+  ACEXML_Exception (void);
+
+  /// All exceptions have names.  This name is used to identify the
+  /// type of an exception.
+  static const ACEXML_Char *exception_name_;
+
+  /// A null string that we return when there is no exception.
+  static const ACEXML_Char *null_;
+};
+
+#if defined (__ACEXML_INLINE__)
+# include "ACEXML/common/Exception.inl"
+#endif /* __ACEXML_INLINE__ */
+
+#include /**/ "ace/post.h"
+
+#endif /* _ACEXML_EXCEPTION_H_ */