I was reading a white paper from a Sql Server tools vendor about how to integrate their tools with SSDT and while it was very interesting there were a couple of inaccuracies and I wanted to clear one of them up and also to help people understand that although SSDT is integrated to Visual Studio it is not tied to it in any way to TFS. You can use SSDT with any source code provider such as TFS, Git, Mercurial, Svn or Source Safe etc although you really should not use source safe for anything as it is the least likely tool to keep your source safe!