Abstract Calendaring API

Autodiscovery

CalDAV Alarms

CalDAV Attachments

Calendars and Contacts Sharing

CalWS-REST and CalWS-SOAP

Consensus Scheduling (VPOLL)

Developer's Guides

Event Publishing Extensions

iSCHEDULE

Non-Gregorian Calendars

OASIS WS-Calendar

PUSH for CalDAV

Tasks (VTODOs)

Timezone service and registry

VAVAILABILITY

vCard Resources