While we on the topic could somebody clarify these: 1. Why function_equal.hpp is not under function? 2. Why function_output_iterator.hpp is not under iterator? And it not using any of iterator adaptor facilities 3. What is generator_iterator.hpp? Why is it not under iterator and is not documented anywhere? 4. What implicit_cast.hpp is doing? Where is it documented? In cast.hpp it says that implicit_cast is removed due to uncertain purpose. 5. Shouldn't throw_exception.hpp be combined with detail/no_exceptions_support.hpp? 6. Shouldn't detail/select_type.hpp be deprecated? 7 Shouldn't detail/catch_exceptions.hpp be deprecated? 8. How iterator/detail/enable_if.hpp is different from utility/enable_if.hpp? 9. Lately many headers appeared in top level directory without being documented (or I have difficulties find docs). Shouldn't all top level headers be covered (unless it's trivial forward header) and have a reference in header itself where docs located? 10. Doesn't mess with classic/standard iostreams bother anyone? http://lists.boost.org/MailArchives/boost/msg71681.php 11. static_warning.hpp by mistake refers to libs/static_assert for docs Regards, Gennadiy