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diff --git a/src/stlplus/persistence/persistent_map.tpp b/src/stlplus/persistence/persistent_map.tpp
new file mode 100644
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+++ b/src/stlplus/persistence/persistent_map.tpp
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+////////////////////////////////////////////////////////////////////////////////
+
+//   Author:    Andy Rushton
+//   Copyright: (c) Southampton University 1999-2004
+//              (c) Andy Rushton           2004-2009
+//   License:   BSD License, see ../docs/license.html
+
+////////////////////////////////////////////////////////////////////////////////
+#include "persistent_int.hpp"
+
+namespace stlplus
+{
+
+  ////////////////////////////////////////////////////////////////////////////////
+
+  template<typename K, typename T, typename P, typename DK, typename DT>
+  void dump_map(dump_context& context, const std::map<K,T,P>& data, DK key_fn, DT val_fn)
+    throw(persistent_dump_failed)
+  {
+    dump_unsigned(context,data.size());
+    for (typename std::map<K,T,P>::const_iterator i = data.begin(); i != data.end(); i++)
+    {
+      key_fn(context,i->first);
+      val_fn(context,i->second);
+    }
+  }
+
+  template<typename K, typename T, typename P, typename RK, typename RT>
+  void restore_map(restore_context& context, std::map<K,T,P>& data, RK key_fn, RT val_fn)
+    throw(persistent_restore_failed)
+  {
+    data.clear();
+    unsigned size = 0;
+    restore_unsigned(context,size);
+    for (unsigned j = 0; j < size; j++)
+    {
+      K key;
+      key_fn(context,key);
+      val_fn(context,data[key]);
+    }
+  }
+
+  ////////////////////////////////////////////////////////////////////////////////
+
+} // end namespace stlplus