March 2009 (IETF 74)IETF - GEOPRIV1 Dynamic Feature Extensions to the Presence Information Data Format Location Object (PIDF-LO) draft-singh-geopriv-pidf-lo-dynamic-05.

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Presentation transcript:

March 2009 (IETF 74)IETF - GEOPRIV1 Dynamic Feature Extensions to the Presence Information Data Format Location Object (PIDF-LO) draft-singh-geopriv-pidf-lo-dynamic-05 Henning Schulzrinne Hannes Tschofenig Martin Thomson Vishal Singh

Background (reminder) Provide information about movement of target –Speed: “traveling at 10 m/s” –Acceleration: “accelerating at 3 m/s 2 ” –Heading: “target is heading north-east” –Orientation: “target is pointing east” March 2009 (IETF 74)IETF - GEOPRIV2

Current version: orientation March 2009 (IETF 74)IETF - GEOPRIV … next slide …

Speed, heading, acceleration March 2009 (IETF 74)IETF - GEOPRIV Seems too complicated for common use cases Really no need to specify units - makes receiver implementation difficult

Simple alternative Avoid units No vertical orientation Not GML, but compatible –GeoRSS is not GML March 2009 (IETF 74)IETF - GEOPRIV

GML March 2009 (IETF 74)IETF - GEOPRIV6 <element name="MovingObjectStatus" type="gml:MovingObjectStatusType" substitutionGroup="gml:TimeSlice"/> duplicates PIDF-LO information – not optional!

example March 2009 (IETF 74)IETF - GEOPRIV T14:00: ESE Not all that helpful

Next steps Gone around the GML circle a few times Finally, decide on one –, simplified –and avoid push-back on GML faithful March 2009 (IETF 74)IETF - GEOPRIV8

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