ion is defined in
<a href="../../../boost/serialization/extended_type_info.hpp" 
target="extended_type_info_hpp">extended_type_info.hpp</a>.

Default implementation of these facilities based on <code style="white-space: normal">typeid(...)</code>
is defined in

<a href="../../../boost/serialization/extended_type_info_typeid.hpp" 
target="extended_type_info_typeid_hpp">extended_type_info_typeid.hpp</a>.

An alternative implementation based on exported class identifiers
is defined in
<a href="../../../boost/s