rfc2445 – Internet Calendaring and Scheduling Core Object Speci
There is a clear need to provide and deploy interoperable calendaring and scheduling services for the Internet. Current group scheduling and Personal Information Management (PIM) products are being extended for use across the Internet, today, in proprietary ways. This memo has been defined to provide the definition of a common format for openly exchanging calendaring and scheduling information across the Internet.
This RFC is 4 years old now, and as far as I know, only Apple’s iCal and the Mozilla calendar module support it. Ironically, the two authors are from Lotus and Microsoft, neither of which produces an RFC2445-compliant calendar application.
Interesting reading: it will be good when more of this is included in other applications.