Vsersion 6.0 or V6.1?

[David]

I'm confused, on the Microsoft web page for Windows SDKs, it says:

Windows Server 2008 & .NET 3.5 SDK is Build 6.0[.6001.18000.367] but is
version 6.1 - default installation directory "C:\Program Files\Microsoft
SDKs\Windows\v6.1" and

Windows Vista Update & .NET 3.0 SDK is build 6.1[.6000.16384.10] but is
version 6.0 - default installation directory "C:\Program Files\Microsoft
SDKs\Windows\v6.0".

Is this just a typo? i.e. V6.1's build should have been Build
6.1[.6001.18000.367] and V6.0's build should have been 6.0[.6000.16384.10] or
is there method in this apparent madness such that the Build first digits
(6.1 and 6.0) are irrelevant and it is the 6001 and 6000 that determine the
version?