MSDN - is it they or me?

In here I cannot find header 开发者_StackOverflow中文版type_traits. Is it missing or I'm missing something (again...).

Because its here: http://msdn.microsoft.com/en-us/library/bb982198.aspx

It's an extension to the standard library.

That's a TR1 header. I don't see any TR1 headers listed there.