Importance

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Abstract

An electronic calendaring and scheduling capability that minimizes storage requirements. Repetitive calendar events are stored as single entries using an expression language. The expression language provides an ability for expressing how often the event recurs. Thus, the days on which the event occurs are computed from an expression stored in a repetitive event. Further, the expression language provides the ability to identify exceptions and to define an infinite number of recurring events from the original recurrent event definition. Events are generated by obtaining a recurrency expression of a first event. The recurrency expression is converted to one or more recurring dates. A beginning date of the first event is also obtained. Using one or more recurring dates and the beginning date, one or more second events are generated in response. The present invention provides the first event and the one or more second events to the users in one or more calendars. The present invention further utilizes a recurrency expression including one or more anti-event expressions. Anti-events have the same format as the recurring event. The anti-event expressions are used to generate one or more exception dates. The exception dates cancel at least one of the recurring dates.

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First Claim