bazaar equivalents for CVS's $Version$ $Author$ $Log$

[Gizbo]

Hi,

I'm evaluating Bazaar in the hopes of breaking from CVS.

One feature of CVS I liked was the ability to include $Log$, $Author$, 
$Version$ and other tags in the source file, which would automatically 
be updated after a commit.

What is the equivalent (if any) in Bazaar?

Thanks