The calendar schema is used to associate people and objects to a period of time. The calendar type is based on the iCalendar specification. Currently, only the event type is defined, but the ToDo and the Journal type can be added in the future as business requirements dictate. The model was extended to allow objects other than people to be associated with an event. This attribute is used to define the purpose of the calendar. The email address for the person. The email address for the person. defines the number of occurrences at which to range-bound the recurrence EventRole should be 'Organizer', 'Mandatory' or 'Optional'. This may become an enumeration at a later period. These are the people that are associated with the event. Values should be limited to FREE, BUSY, BUSY-UNAVAILABLE, and BUSY-TENTATIVE contains a positive integer representing how often the recurrence rule repeats. The default value is "1", meaning every second for a SECONDLY rule, or every minute for a MINUTELY rule, every hour for an HOURLY rule, every day for a DAILY rule, every week for a WEEKLY rule, every month for a MONTHLY rule and every year for a YEARLY rule. This identifies the notification method. This element is used to identify an organizer when the organizer is not a participantin the event.