WebDAV stands for "Web-based
Distributed Authoring and Versioning" and is
a set of extensions to the HTTP protocol
which allow users to collaboratively edit
and manage files on remote web servers. WebDAV is sometimes shortened to DAV.
Since at least 1998, Internet Engineering Task Force (IETF) working
groups have published RFCs on WebDAV and related issues. These
publications are considered
specifications for versioning, access control, searching, and ordering
of resources. Many of the specifications have been implemented in software
that is present in many open source and commercial offerings.
See webdav.org for more information. Also, search the web for articles about WebDAV in the popular computing press.