Dynamic Feature Extensions to the Presence Information Data Format Location Object (PIDF-LO)
The Geopriv Location Object introduced by the Presence Information Data Format Location Object (PIDF-LO), RFC 4119, defines a basic XML format for carrying geographical information of a presentity. This document extends the <location> element specified in RFC 4119 to carry temporal feature elements useful for tracking moving objects. It defines four elements, namely speed, bearing, acceleration, and elevation. The document also specifies mechanism to carry multiple moving object's status elements and proposes mechanism to indicate the type of the PIDF-LO content.