Subversion supports the following keywords:

* The last time the file was known to have been changed in the repository
$LastChangedDate$
$Date$

* The last known revision in which this file changed in the repository,
$LastChangedRevision$
$Revision$
$Rev$

* The last known user to change this file in the repository
$LastChangedBy$
$Author$

* The full URL to the latest version of the file in the repository,
$HeadURL$
$URL$

* The combination of the other keywords.
$Id$

N.B. LastChangedDate, LastChangedRevision, Revision, LastChangedBy and HeadURL are case sensitive.