Calendaring protocols
CalDAV protocol
CalDAV or Calendaring Extension to WebDAV is a standard allowing the client to access scheduling
information on a remote server. CalDAV works by modeling events, which may be meetings or
appointments or other engagements, as HTTP resources. Events are encoded in standard iCalendar
format and organized into WebDAV collections to allow browsing and synchronization. A CalDAV
server supports a number of operations such as generating free-busy time reports and expanding
recurring events. With this functionality, a user may synchronize his or her own calendar to a
CalDAV server, and share it among multiple devices or with other users. The CalDAV protocol also
supports other non-personal calendars, such as calendars for sites or organizations.
WebDAV protocol
Web-based Distributed Authoring and Versioning, or WebDAV, is a set of extensions to the
Hypertext Transfer Protocol (HTTP) which allows users to collaboratively edit and manage files on
remote web servers. The group of developers responsible for these extensions was also known by
the same name and was a working group of the Internet Engineering Task Force. The protocol
facilitates "Intercreativity", making the Web a readable and writeable medium. The protocol
provides functionality to create, change and move documents on a remote server (typically a web
server or "web share"). This is useful for, among other things, authoring the documents hosted on a
web server, but can also be used for general web-based file storage that can be accessed from
anywhere. Important features in the WebDAV protocol include locking (overwrite prevention),
properties (creation, removal, and querying of information about the author, modified date, etc.),
namespace management (ability to copy and move Web pages within a server's namespace) and
collections (creation, removal, and listing of resources). Most modern operating systems provide
built-in support for WebDAV. With the right client and a fast network, it can be almost as easy to
use files on a WebDAV server as those stored in local directories.
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