Jetspeed (as of 1.2b1) implements a subset of RFC 2445
or iCalendar.
From RFC 2445:
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.
iCalendar is an internet RFC that addresses communication between calendaring
clients. It defines a set of objects and a method for writing those objects
to a character output stream.
Any client which understands the iCalendar protocol should be able to share
appointment , to-do, and other calendar information with any other calendar
client or server.
iCalendar was made a separate module from Jetspeed, since it is a general utility.
Unfortunately, currently it has lost visibility in the jakarta project.
If you are interested in contributing to a portable implementation of RFC2445,
please contact
Jeff Prickett.