Core Object
The top-level element in iCalendar is the Calendaring and Scheduling Core Object, a collection of calendar and scheduling information. Typically, this information will consist of a single iCalendar object. However, multiple iCalendar objects can be grouped together.
The first line must be "BEGIN:VCALENDAR", and the last line must be "END:VCALENDAR"; the contents between these lines is called the "icalbody".
The body of the iCalendar object (the icalbody) is made up of a list of calendar properties and one or more calendar components. The calendar properties apply to the entire calendar. The calendar components are several calendar properties which create a calendar schematic (design). For example, the calendar component can specify an event, a to-do list, a journal entry, time zone information, or free/busy time information, or an alarm. Empty lines are not allowed in some versions of usage (Google calendar).
Here is a simple example of an iCalendar object, "Bastille Day Party" event which occurs July 14, 1997 17:00 (UTC) through July 15, 1997 03:59:59 (UTC):
BEGIN:VCALENDAR VERSION:2.0 PRODID:-//hacksw/handcal//NONSGML v1.0//EN BEGIN:VEVENT UID:uid1@example.com DTSTAMP:19970714T170000Z ORGANIZER;CN=John Doe:MAILTO:john.doe@example.com DTSTART:19970714T170000Z DTEND:19970715T035959Z SUMMARY:Bastille Day Party END:VEVENT END:VCALENDARThere are many different types of components which can be used in iCalendar, as described below.
Read more about this topic: ICalendar, Technical Specifications
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