On Tue, 22 Sep 2009 16:07:03 -0700, you wrote: That's legal. The longer story is that version numbers start with 1, and ";0" is shorthand for the most recent version. "FOO.TXT;" is just shorthand for "FOO.TXT;0". It's also legal to say "FOO.TXT;-1" meaning the previous version (i.e. most recent -1), as is ";-2", ";-3", etc. It's legal ";-0" too, meaning the oldest version available :) G.