dtstart - a Net::ICal::Time for when this Todo starts.
duration - a Net::ICal::Duration; how long this thing will take to do.
alarms - an array of Net::ICal::Alarm objects; reminders about doing this item.
class - PUBLIC, PRIVATE, or CONFIDENTIAL - the creator's intention about who should see this Todo.
created - a Net::ICal::Time saying when this object was created.
description - a hash with at least a content key, maybe an altrep and a language key. Content is a description of this Todo.
dtstamp - when this Todo was created. Will be set to the current time unless otherwise specified.
geo - a pair of real numbers--- the latitude and longitude of this Todo.
last_modified - a Net::ICal::Time specifying the last time this object was changed.
location - a hash for where this Todo is taking place. The content key points to a string about the location; the altrep key gives an alternate representation, for example a URL.
priority - a number from 0 (undefined) to 1 (highest) to 9 (lowest) representing how important this event is.
status - NEEDS-ACTION, IN-PROGRESS, COMPLETED, or CANCELLED; the status of this todo item.
summary - a one-line summary of this Todo. If you need more space, use the description parameter.
uid - a globally unique identifier for this event. Will be created automagically.
url - a URL for this Todo. Optional.
attach - a Net::ICal::Attach - attached file for this Todo.
attendee - who's going to be at this meeting; an array of Net::ICal::Attendee objects.
categories - what categories this event falls into. Make up your own categories. Optional.
comment - a hash like that for description (above), comments on this Todo item.
contact - a string describing who to contact about this Todo.
request_status - how successful we've been at scheduling this Todo so far. Values can be integers separated by periods. 1.x.y is a preliminary success, 2.x.y is a complete successful request, 3.x.y is a failed request because of bad iCal format, 4.x.y is a calendar server failure.
related_to - an array of other Event, Todo, or Journal objects this Todo is related to.
resources - resources (such as an overhead projector) required for doing this task.
sequence - an integer that starts at 0 when this object is created and is incremented every time the object is changed.