svn:date Contains the UTC time the revision was created, in ISO 8601 format. The value comes from the server machine's clock, not the client's. svn:log Contains the log message describing the revision. svn:autoversioned If present, the revision was created via the autoversioning feature. See "Autover- sioning" on page 378. Repository Hooks The following are the repository hooks that Subversion provides. start-commit Description Notification of the beginning of a commit. The start-commit hook is run before the commit transaction is even created. It is typically used to decide whether the user has commit privileges at all. If the start-commit hook program returns a nonzero exit value, the commit is stopped before the commit transaction is even created, and anything printed to stderr is marshaled back to the client.