iCalendar format links

I’m trying something weird with Movable Type that includes creating calendar files from the blog’s entries; for that to work, I need to code up a template in iCal/vCal/iCalendar format. To do that, I need to learn that format. I’ve been reading up; it’s still quite bewildering, and I’m probably going to get it wrong and have to abandon it. But here are some of the links I’ve accumulated so far.