CAP was not received with enthusiasm, perhaps due to its complexity. Unfortunately, although the iCalendar format garnered widespread adoption, the CalSch plan for exchanging it did not. ICalendar ( RFC 2445) specifies only how calendar events are formatted and stored it builds on the preexisting vCalendar format by the Versit Consortium - the same folks who brought us the vCard format used in address books. Netscape championed the formation of an IETF working group for calendaring and scheduling called CalSch, which eventually produced the iCalendar data format and the Calendar Access Protocol ( CAP) for transporting it. In 1996, Netscape - riding high on its dominance of the Web browser market - decided to take a crack at the calendaring and scheduling piñata. Microsoft has long supported these features in its Outlook email and groupware client, but using only a closed and proprietary protocol and communicating only with Microsoft’s Exchange server. CalDAV is a protocol that allows sharing, synchronization, and searching of calendar data between multiple users in multiple locations. In the business world, though, individual calendars are no good unless you can query other people’s availability, schedule meetings, reserve locations, and access your information as you travel. Let’s see what makes it tick.Ĭalendar software has been around for decades, allowing users to maintain multiple calendars on their computers. As open source developers assault the calendaring problem, you will hear more and more about CalDAV, the calendaring and scheduling extensions to the WebDAV protocol. Calendaring software, and in particular Microsoft Outlook, is frequently cited as a killer app that keeps would-be Linux users on Windows.
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