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diff --git a/boost_ext/boost/bimap/relation/support/value_type_of.hpp b/boost_ext/boost/bimap/relation/support/value_type_of.hpp
new file mode 100644
index 0000000..9dc5761
--- /dev/null
+++ b/boost_ext/boost/bimap/relation/support/value_type_of.hpp
@@ -0,0 +1,91 @@
+// Boost.Bimap
+//
+// Copyright (c) 2006-2007 Matias Capeletto
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+/// \file relation/support/value_type_of.hpp
+/// \brief value_type_of<tag,relation> metafunction
+
+#ifndef BOOST_BIMAP_RELATION_SUPPORT_VALUE_TYPE_OF_HPP
+#define BOOST_BIMAP_RELATION_SUPPORT_VALUE_TYPE_OF_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER>=1200)
+#pragma once
+#endif
+
+#include <boost/config.hpp>
+
+#include <boost/bimap/relation/detail/metadata_access_builder.hpp>
+
+/** \struct boost::bimaps::relation::support::value_type_of
+
+\brief Metafunction to obtain the value type of one of the sides.
+
+\code
+
+template< class Tag, class Relation >
+struct value_type_of
+{
+        typedef typename Relation::{side}_type type;
+};
+
+\endcode
+
+See also member_at, get().
+\ingroup relation_group
+                                                                    **/
+
+namespace boost {
+namespace bimaps {
+namespace relation {
+namespace support {
+
+// Metafunction value_type_of
+/*
+
+    template< class Tag, class Relation >
+    struct value_type_of
+    {
+        typedef -unspecified- type;
+    };
+
+*/
+
+BOOST_BIMAP_SYMMETRIC_METADATA_ACCESS_BUILDER
+(
+    value_type_of,
+    left_value_type,
+    right_value_type
+)
+
+// Add support for info tags to value_type_of
+
+template< class Tag, class SymmetricType >
+struct value_type_of
+<
+    Tag, SymmetricType,
+    BOOST_DEDUCED_TYPENAME enable_if
+    <
+        ::boost::bimaps::relation::support::is_tag_of_member_at_info
+        <
+            Tag,
+            SymmetricType
+        >
+
+    >::type
+>
+{
+    typedef BOOST_DEDUCED_TYPENAME SymmetricType::info_type type;
+};
+
+} // namespace support
+} // namespace relation
+} // namespace bimaps
+} // namespace boost
+
+
+#endif // BOOST_BIMAP_RELATION_SUPPORT_VALUE_TYPE_OF_HPP
+