2.1.3.1.1.18 Property: X-WR-RELCALID

RFC Reference: N/A

Number of Instances Allowed: 0, 1

Format: Text ([RFC2445] section 4.3.11)

Brief Description: Specifies a globally unique identifier for the calendar.

Importing to Calendar objects

This property SHOULD<41> be used and persisted by the iCalendar renderer to decide whether the import overwrites an existing calendar or creates a new calendar.

Exporting from Calendar objects

This property MUST be omitted if the iCalendar represents a single appointment or meeting.

If this iCalendar represents a calendar export, this property SHOULD<42> be set to a value that will be globally unique for different calendars, but consistent across multiple exports of the same calendar.