You may want to consider whether something no more complicated than
the setup used at present for the TEI web site works. This is a change
management system (currently Perforce, coulld be CVS or SVN)
in which empowered folks (currently about 6) can store XML files.
Obviously that provides versioning, conflict management, tracking etc.
A web server delivers the documents up using Cocoon.
Can you articulate a list of functional requirements which go _beyond_
this? Is web-based editing necessary? what workflow needs to