In message <199608310041.RAA23761@spice.perforce.com>, Christopher Seiwald writ es: > >Clearly the URL is not sufficient: multiple users can be working on the >same document. > >URL+username might be better, but I can easily imagine a case where the >same named user (or the same user) is working on a single document from >two different places. > >URL+username+hostname? Maybe. This is what Derived-From: and Version: are all about: in response to a GET (for edit), the server emits Version: ... . In the corresponding PUT, the client includes Derived-From: ... . See Dave Long's draft for details. Dan