RFC 4481-2006 Timed Presence Extensions to the Presence Information Data Format (PIDF) to Indicate Status Information for Past and Future Time Intervals
The Presence Information Data Format (PIDF) defines a basic XML format for presenting presence information for a presentity. This document extends PIDF@ adding a timed status extension that allows a presentity to declare its status for a time interval fully in the future or the past.
RFC 4481-2006 history
2006RFC 4481-2006 Timed Presence Extensions to the Presence Information Data Format (PIDF) to Indicate Status Information for Past and Future Time Intervals