Open calendar sharing and scheduling with CalDAV

Building on a decade of work on calendar standards, the CalDAV protocol promises to unlock the potential of widespread calendar interoperability. It permits calendar sharing over the Web and reduces the coordination cost of scheduling meetings across and within organizational boundaries. The protocol extends the Web Distributed Authoring and Versioning (WebDAV) protocol-itself, a simple extension of HTTP- to provide services for calendar maintenance, queries, event scheduling, and security.