a set of methods, headers, request entity body formats and response entity body formats that provide operations for:
Properties: The ability to create, remove, and query information about Web pages, such as their authors, creation dates, etc. Also, the ability to link pages of any media type to related pages.
Collections: The ability to create sets of documents and to retrieve a hierarchical membership listing (like a directory listing in a file system).
Locking: The ability to keep more than one person from working on a document at the same time. This prevents the ``lost update problem'' in which modifications are lost as first one author then another writes changes without merging the other author's changes.
Namespace Operations: The ability to instruct the server to copy and move Web resources.
CVS does not implement WebDAV at all. Subversion only partially implements it.