2019-05-06 Calendaring and scheduling — Support for iCalendar Relationships CC/CD 51004:2018 csd/cc-51004.xml csd/cc-51004.html csd/cc-51004.pdf csd/cc-51004.doc csd/cc-51004.rxl en 2018 CalConnect CalConnect CalConnect 2018-11-30 1 en committee-draft CALENDAR