As Simon pointed out, for any Advanced setup, not. There's the db
associated with Open Directory, various sqlite dbs connected to
other services, and potentially MySQL dbs,
That is where there is some inconsistency with the "OK for standard
and workgroup but not for advanced" comment in the manual. Standard
and workgroup configurations also rely on Open Directory - in fact the
master OD domain is created automatically when you choose these
configurations...
In fact, one of my customers used TM to backup his server, and when we
had to restore the thing, the main issue we met was missing logs for
some services (wikis and others). As soon as these logs were re-
created, the server worked perfectly and has been up and running for
months.