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diff --git a/src/stlplus/persistence/persistent_triple.tpp b/src/stlplus/persistence/persistent_triple.tpp
new file mode 100644
index 0000000..9c3c978
--- /dev/null
+++ b/src/stlplus/persistence/persistent_triple.tpp
@@ -0,0 +1,37 @@
+////////////////////////////////////////////////////////////////////////////////
+
+//   Author:    Andy Rushton
+//   Copyright: (c) Southampton University 1999-2004
+//              (c) Andy Rushton           2004-2009
+//   License:   BSD License, see ../docs/license.html
+
+////////////////////////////////////////////////////////////////////////////////
+
+namespace stlplus
+{
+
+  ////////////////////////////////////////////////////////////////////////////////
+
+  template<typename T1, typename T2, typename T3, typename D1, typename D2, typename D3>
+  void dump_triple(dump_context& context, const triple<T1,T2,T3>& data, 
+                   D1 dump_fn1, D2 dump_fn2, D3 dump_fn3)
+    throw(persistent_dump_failed)
+  {
+    dump_fn1(context,data.first);
+    dump_fn2(context,data.second);
+    dump_fn3(context,data.third);
+  }
+
+  template<typename T1, typename T2, typename T3, typename R1, typename R2, typename R3>
+  void restore_triple(restore_context& context, triple<T1,T2,T3>& data,
+                      R1 restore_fn1, R2 restore_fn2, R3 restore_fn3)
+    throw(persistent_restore_failed)
+  {
+    restore_fn1(context,data.first);
+    restore_fn2(context,data.second);
+    restore_fn3(context,data.third);
+  }
+
+  ////////////////////////////////////////////////////////////////////////////////
+
+} // end namespace stlplus