The document discusses calendar standards including iCalendar (RFC2445) which defines a standard format for managing calendar events and tasks. It describes how calendaring allows users to manage their time by recording events, scheduling tasks, and organizing meetings. It also discusses different calendar formats (iCalendar and vCalendar), conversion issues between formats, and CalDAV which provides a standard protocol for accessing calendar events over HTTP.

1. ICalendar (RFC2445)
A quick introduction to RFC2445

2. Agenda
1. Calendaring: it's about managing our time
2. Calendar formats:vcs and ics
3. Conversion issues
4. A managing protocol

3. Calendaring
Calendaring is the capability to manage your time.
Record events;
schedule tasks;
organize meetings.
Share these infos and access them from everywhere .

4. Calendaring II
Email.. Calendaring ..
is about connecting people; makes people meet;
use standard protocols: use various standards:
MIME - exchange vcs/ics/??? - exchange
IMAP - access caldav/Wcap - access
SMTP - transfer SMTP/??? - transfer
We want a standard set of protos for calendaring!

5. Calendaring III - use cases
Create a personal BEGIN:VCALENDAR
BEGIN:VEVENT
appointment with a SUMMARY:my appointment
reminder; DTSTART:20081205T120000
DTEND:20081205T130000
BEGIN:VALARM
create a public event; TRIGGER:PT10
ACTION;EMAIL:mailto:rpolli@me.it
END:VALARM
subscribe somebody's END:VEVENT
agenda; END:VCALENDAR

6. Calendaring III - use cases
Organize a meeting:
1. identify attendees
2. check attendees freebusy
3. schedule meeting
4. send invitation
5. process responses

7. Calendaring III - use cases
Manage a recurring event:
1. create the recurring event
2. add exclusion
3. reschedule/modify a single occurrence

8. Calendaring III - use cases
Moreover we want to carry all these infos with us,no matter
which device we're using:
1. Laptop;
2. Mobiles;
3. PDA;
4. Webapps;
5. ...

9. Formats
Events are stored mainly in 2 formats:
format;extension;mime;rfc;desktop;mobile;
iCalendar;ics;text/calendar;2445;yes;NO;
vCalendar;vcs;text/x-vcalendar;NO;yes;yes

10. Formats II
Differences between ics/vcs

11. Conversion issues
non standard properties, recurrence-id, alarms

12. Calendar access protocol
CalDAV is a standard protocol for accessing calendar event.
it's an extension of WebDAV/HTTP;
stores events in browsable file/folder;
retrieves events by query;
provides ACL.