footers on source files

[mythdl]

while browsing the source code i noticed that there are footers at the bottom of each file. Are these created automatically by CVS or another program?
eg:

<pre>/**
* @file
* $Id: DirectoryListing.h,v 1.27 2004/04/24 09:40:58 arnetheduck Exp $
*/</pre>

[TheParanoidOne]

The $Id$ keyword is from CVS. If you insert just that keyword, CVS will automatically expand the tag to show the most current information. There are many other keywords, as shown here.