In the review Jeff Garland suggested a top level <boost/bimap.hpp> header. I have added this header to the library. It put the bimap class in the boost namespace. It is not an "include all" header, it only allow the basic case in which both collection types are sets ( bimap<X,Y> ). I think that this is the best approach because lows the barrier to use the library without damaging compile time by including stuff that the user will not use. If he wants other features, he will have to include the appropriate headers. In its minimal form, the library can be used now like: #include <boost/bimap.hpp> int main() { typedef boost::bimap< std::string, int > bm_type; bm_type bm; bm.insert( bm_type::value_type("one",1) ); assert( bm.left.find("one")->second == 1 ); } Do you think this is the correct approach? Regards Matias