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<?php
/**
* Recurrence Date/Times Property
* @package qCal
* @copyright Luke Visinoni (luke.visinoni@gmail.com)
* @author Luke Visinoni (luke.visinoni@gmail.com)
* @license GNU Lesser General Public License
* @todo Make sure allowedCompoents is correct. The RFC isn't dead clear
*
* RFC 2445 Definition
*
* Property Name: RDATE
*
* Purpose: This property defines the list of date/times for a
* recurrence set.
*
* Value Type: The default value type for this property is DATE-TIME.
* The value type can be set to DATE or PERIOD.
*
* Property Parameters: Non-standard, value data type and time zone
* identifier property parameters can be specified on this property.
*
* Conformance: The property can be specified in "VEVENT", "VTODO",
* "VJOURNAL" or "VTIMEZONE" calendar components.
*
* Description: This property can appear along with the "RRULE" property
* to define an aggregate set of repeating occurrences. When they both
* appear in an iCalendar object, the recurring events are defined by
* the union of occurrences defined by both the "RDATE" and "RRULE".
*
* The recurrence dates, if specified, are used in computing the
* recurrence set. The recurrence set is the complete set of recurrence
* instances for a calendar component. The recurrence set is generated
* by considering the initial "DTSTART" property along with the "RRULE",
* "RDATE", "EXDATE" and "EXRULE" properties contained within the
* iCalendar object. The "DTSTART" property defines the first instance
* in the recurrence set. Multiple instances of the "RRULE" and "EXRULE"
* properties can also be specified to define more sophisticated
* recurrence sets. The final recurrence set is generated by gathering
* all of the start date/times generated by any of the specified "RRULE"
* and "RDATE" properties, and excluding any start date/times which fall
* within the union of start date/times generated by any specified
* "EXRULE" and "EXDATE" properties. This implies that start date/times
* within exclusion related properties (i.e., "EXDATE" and "EXRULE")
* take precedence over those specified by inclusion properties (i.e.,
* "RDATE" and "RRULE"). Where duplicate instances are generated by the
* "RRULE" and "RDATE" properties, only one recurrence is considered.
* Duplicate instances are ignored.
*
* Format Definition: The property is defined by the following notation:
*
* rdate = "RDATE" rdtparam ":" rdtval *("," rdtval) CRLF
*
* rdtparam = *(
*
* ; the following are optional,
* ; but MUST NOT occur more than once
*
* (";" "VALUE" "=" ("DATE-TIME" / "DATE" / "PERIOD")) /
* (";" tzidparam) /
*
* ; the following is optional,
* ; and MAY occur more than once
*
* (";" xparam)
*
* )
*
* rdtval = date-time / date / period
* ;Value MUST match value type
*
* Example: The following are examples of this property:
*
* RDATE:19970714T123000Z
*
* RDATE;TZID=US-EASTERN:19970714T083000
*
* RDATE;VALUE=PERIOD:19960403T020000Z/19960403T040000Z,
* 19960404T010000Z/PT3H
*
* RDATE;VALUE=DATE:19970101,19970120,19970217,19970421
* 19970526,19970704,19970901,19971014,19971128,19971129,19971225
*/
class qCal_Property_Rdate extends qCal_Property_MultiValue {
protected $type = 'DATE-TIME';
protected $allowedComponents = array('VEVENT','VTODO','VJOURNAL','VTIMEZONE');
}