| The Web Distributed Authoring and Versioning protocol, or DAV for short. This monster is an extension to the HTTP protocol that allows web documents to be updated remotely - a sort of opens source version of FrontPage Extensions. It will allow people to use their web server as an advanced file repository and concurrent versioning system. It includes HTTP methods for remotely locking documents, setting read/write properties, namespace management and support for XML.
The mod_dav module has already been written for apache and there is WebDAV support for IIS (although this is, surprise surprise, non-standard) and other leading web servers. For more information see the RFC2518 or http://www.webdav.org | 
