2.1.3.1.1.15 Property: X-PUBLISHED-TTL
RFC Reference: N/A
Number of Instances Allowed: 0, 1
Format: Duration ([RFC2445] section 4.3.6)
Brief Description: Specifies a suggested iCalendar file download frequency for clients and servers with sync capabilities.
Importing to Calendar objects
This property SHOULD<32> be ignored.
Exporting from Calendar objects
If this iCalendar is being automatically published to a remote location at regular intervals, this property SHOULD<33> be set to that interval with a minimum granularity of minutes.