Hi, from the C++0x standard, 7.3.3 (5) I gather that it is not possible to write a using statement to import a templated function into the global namespace. E.g. #include <boost/units/quantity.hpp> using template<typename X, typename Y> boost::units::quantity_cast<X,Y>; will be malformed. The only alternatives I have been able to come up with are 1) Use boost::units::quantity_cast<X>(Y) which is a bit longwinded 2) Write a new quantity_cast in the global namespace, and forward it to the boost::units one. Is there a better way? (Sorry that this is only borderline a boost question) -- kind regards, Esben