EKParticipantStatus.unknown The participant’s attendance status is unknown. Declarationcase unknown See AlsoConstantsEKParticipantStatus.pendingEKParticipantStatus.acceptedEKParticipantStatus.declinedEKParticipantStatus.tentativeEKParticipantStatus.delegatedEKParticipantStatus.completedEKParticipantStatus.inProcess