The DAVfs Linux file system driver (a.k.a davfs2) is a Linux file system driver that allows you to mount a WebDAV server as a disk drive. WebDAV is an extension to HTTP/1.1 that allows remote collaborative authoring of Web resources, defined in RFC 2518. DAVfs allows a remote Web server to be edited using standard applications that interact with the file system. For example, a remote Web site could be updated in-place, using the same development tools that initially created the site. DAVfs also supports SSL.
Catacomb is a WebDAV repository module for use with the Apache WebDAV module, mod_dav. Apache mod_dav parses WebDAV protocol requests into operations on a repository providing persistent storage of resources and their properties. The default repository for mod_dav is provided by a separate module, mod_dav_fs, which stores resource bodies as files in the filesystem, and stores properties in a (G)DBM database. Catacomb provides a replacement for mod_dav_fs called mod_dav_repos that stores resources and their properties in a relational database (MySQL). The primary advantage of this approach is the searching capabilities of the database are used to implement the DASL protocol.