representing scheduled events

[Mark Nottingham <mnot@xxxxxxxxxx>]

Hello,

Just a quick question. I've seen several fields where it's desireable
to model a scheduled event and then represent it in some form (XML or
a simple string, usually).

For example, I'd want to model and express:
  - "Every Tueday at 6pm"
  - "The first Monday of the month at noon"
  - "Every other day at midnight"

Possible uses include for HTTP cache freshness, recurring events in
RSS news feeds, and policy updates for things like P3P. In general,
I'm talking about representing a publication schedule.

Does calsch have a solution for this, or any thoughts that would
point an effort to develop such a thing in the right direction?

Cheers,

-- 
Mark Nottingham, Research Scientist
Akamai Technologies (San Mateo, CA USA)