The documentation for Boost.Iterator says "Both iterator_facade and iterator_adaptor as well as many of the specialized adaptors <http://www.boost.org/doc/libs/1_46_1/libs/iterator/doc/index.html#specialized-adaptors> mentioned below have been proposed for standardization, and accepted into the first C++ technical report" But I don't see that in <http://www.boost.org/doc/libs/1_46_1/doc/html/boost_tr1.html> or notice anything concerning them in other TR1 writeups. Can someone clarify the situation?