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diff --git a/TAO/tests/Param_Test/recursive_union.h b/TAO/tests/Param_Test/recursive_union.h
new file mode 100644
index 00000000000..5ebeaac1dd7
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+++ b/TAO/tests/Param_Test/recursive_union.h
@@ -0,0 +1,99 @@
+// $Id$
+
+// ============================================================================
+//
+// = LIBRARY
+//    TAO/tests/Param_Test
+//
+// = FILENAME
+//    recursive_union.h
+//
+// = DESCRIPTION
+//    Tests a union that contains a sequence of itself
+//
+// = AUTHORS
+//    Jeff Parsons <parsons@cs.wustl.edu>
+//
+// ============================================================================
+
+#ifndef PARAM_TEST_RECURSIVE_UNION_H
+#define PARAM_TEST_RECURSIVE_UNION_H
+
+#include "param_testC.h"
+#include "helper.h"
+
+// =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*
+//           test recursive unions
+// =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*
+
+class Test_Recursive_Union
+{
+public:
+  Test_Recursive_Union (void);
+  // ctor
+
+  ~Test_Recursive_Union (void);
+  // dtor
+
+  int run_sii_test (Param_Test_ptr objref
+                    ACE_ENV_ARG_DECL);
+  // run the SII test
+
+  const char *opname (void) const;
+  // return operation name
+
+  int init_parameters (Param_Test_ptr objref
+                       ACE_ENV_ARG_DECL);
+  // set values for parameters
+
+  int reset_parameters (void);
+  // reset values for CORBA
+
+  CORBA::Boolean check_validity (void);
+  // check if results are valid
+
+  CORBA::Boolean check_validity (CORBA::Request_ptr req);
+  // check if results are valid. This is used for DII results
+
+  void print_values (void);
+  // print all the values
+
+  void dii_req_invoke (CORBA::Request *
+                       ACE_ENV_ARG_DECL_NOT_USED);
+  // invoke DII request with appropriate exception handling.
+
+private:
+  char *opname_;
+  // operation name
+
+  Param_Test::Recursive_Union in_;
+  // in parameter
+
+  // these need memory management
+  Param_Test::Recursive_Union_var inout_;
+  // inout parameter
+
+  Param_Test::Recursive_Union_var out_;
+  // out parameter
+
+  Param_Test::Recursive_Union_var ret_;
+  // return value
+
+  void deep_init (Param_Test::Recursive_Union &u,
+                  Generator *gen,
+                  CORBA::ULong level);
+
+  void deep_init_nested (Param_Test::nested_rec_union &nu,
+                         Generator *gen,
+                         CORBA::ULong level);
+  // helper functions for init_parameters
+
+  CORBA::Boolean deep_check (const Param_Test::Recursive_Union &in_union,
+                             const Param_Test::Recursive_Union &test_union);
+
+  CORBA::Boolean deep_check_nested (const Param_Test::nested_rec_union &in,
+                                    const Param_Test::nested_rec_union &test);
+  // helper functions for check_validity
+};
+
+#endif /* PARAM_TEST_RECURSIVE_UNION_H */