Network Working Group H. Schulzrinne Internet-Draft Columbia University Intended status: Experimental H. Tschofenig Expires: September 10, 2009 Nokia Siemens Networks M. Thomson Andrew Corporation V. Singh March 9, 2009 Dynamic Feature Extensions to the Presence Information Data Format Location Object (PIDF-LO) draft-singh-geopriv-pidf-lo-dynamic-05.txt Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on September 10, 2009. Copyright Notice Copyright (c) 2009 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents in effect on the date of publication of this document (http://trustee.ietf.org/license-info). Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Schulzrinne, et al. Expires September 10, 2009 [Page 1] Internet-Draft Dynamic Feature Extensions to PIDF-LO March 2009 Abstract 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. The PIDF-LO specification made a subset of the functionality offered by the Geography Markup Language (GML) standard 3.0 mandatory to implement. This document defines child elements to the element specified in RFC 4119 to carry temporal feature elements useful for tracking moving objects. Elements are defined that enable expression of speed, heading, acceleration and facing of the presentity. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Dynamic Elements . . . . . . . . . . . . . . . . . . . . . . . 3 4. XML Schema . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5. Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6. Security Considerations . . . . . . . . . . . . . . . . . . . . 6 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 7 7.1. Dynamic Feature Extensions Namespace Registration . . . . . 7 7.2. Dynamic Feature Extensions Schema Registration . . . . . . 7 7.3. Units of Measure Registration . . . . . . . . . . . . . . . 8 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 8 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 8 9.1. Normative References . . . . . . . . . . . . . . . . . . . 8 9.2. Informative References . . . . . . . . . . . . . . . . . . 8 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 9 Schulzrinne, et al. Expires September 10, 2009 [Page 2] Internet-Draft Dynamic Feature Extensions to PIDF-LO March 2009 1. Introduction The Presence Information Data Format - Location Object (PIDF-LO) (see RFC 4119 [RFC4119]) provides geographical location of a presentity. This corresponds to a physical location at a given instance of time. The PIDF-LO specification made a subset of the functionality offered by the Geography Markup Language (GML) standard 3.0 mandatory to implement. With the extensions defined in [I-D.ietf-geopriv-pdif-lo-profile] more guidelines to implementers are being provided with respect to a number of location shapes that have to be supported for usage within PIDF-LO. The addition of rate of change information to the PIDF-LO enables a range of use cases. These use cases either directly use dynamic information, or use that information for smoother tracking of a position over time. For example, an application that continuously tracks a presentity could use velocity information to extrapolate positions in between times location information is measured. A shipping company could directly use speed to monitor trucks speed to ensure speed limits are observed. 2. Terminology In this document, the key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" are to be interpreted as described in RFC 2119 [RFC2119]. 3. Dynamic Elements This document defines a new element, , for the conveyance of dynamic information. Dynamic information MAY be included without any other location information being present. When dynamic information is associated with information about the instantaneous position of the presentity, the element MUST be included in the same element as the corresponding geodetic (or civic) location information. Dynamic information can be ignored if a recipient does not support this specification. The element MUST include an "srsName" attribute that it set to "urn:ogc:def:crs:EPSG::4979". This document uses the application schema profile defined in [GeoShape] (reference the OGC shapes document) with the addition of "direction.xsd" (identified by the URN "urn:opengis:specification:gml:schema-xsd:direction:3.1.1"). The element contains the following components: Schulzrinne, et al. Expires September 10, 2009 [Page 3] Internet-Draft Dynamic Feature Extensions to PIDF-LO March 2009 speed: Speed is the time rate of change in position of a presentity without regard for direction. The value for the element MUST be defined in meters per second and the 'uom' attribute MUST be set to "urn:ietf:params:ns:geopriv:dynamic:uom#mps". acceleration: This element specifies the rate usually rapid at which something happens. The element also contains a 'uom' attribute that MUST be set to "urn:ietf:params:ns:geopriv:dynamic:uom#mps2". heading: Heading is defined as the horizontal direction of one terrestrial point from another, expressed as the angular distance from a reference direction. It is usually measured from 000 degrees at the reference direction clockwise through 360 degrees. orientation: The element describes the orientation of the presentity; the direction that the object is pointing. The and elements are of the type gml: DirectionPropertyType, which allows many variations. For use in this document , the element MUST be used with the and child elements. The element indicates an angle in degrees from Northing to Easting; indicates an angle above the horizontal plane. Inclusion of a vertical angle is mandated by schema; setting the 'uom' attribute to "urn:ogc:def:uom:EPSG::9102" (unity) with a value of "0" indicates that the vertical angle is not known. The and elements MUST include a "uom" attribute set to "urn:ogc:def:uom:EPSG::9102". 4. XML Schema Schulzrinne, et al. Expires September 10, 2009 [Page 4] Internet-Draft Dynamic Feature Extensions to PIDF-LO March 2009 5. Example Schulzrinne, et al. Expires September 10, 2009 [Page 5] Internet-Draft Dynamic Feature Extensions to PIDF-LO March 2009 90 5 3.2 180 0 0 Figure 1: Example of a dynamic extension 6. Security Considerations This document defines additional location elements carried by PIDF-LO (see [RFC4119]). The security considerations of RFC 4119 [RFC4119] are applicable to this document. Schulzrinne, et al. Expires September 10, 2009 [Page 6] Internet-Draft Dynamic Feature Extensions to PIDF-LO March 2009 7. IANA Considerations This section registers a new XML namespace (as described in [RFC3688]) and a new XML schema. 7.1. Dynamic Feature Extensions Namespace Registration URI: urn:ietf:params:xml:ns:pidf:geopriv10:dynamic10" Registrant Contact: IETF Geopriv Working Group, Hannes Tschofenig (hannes.tschofenig@nsn.com). XML: BEGIN Dynamic Feature Extensions Namespace

Namespace for Dynamic Feature Extensions to PIDF-LO

urn:ietf:params:xml:ns:pidf:geopriv10:dynamic10

See RFCXXXX [NOTE TO IANA/RFC-EDITOR: Please replace XXXX with the RFC number of this specification.].

END 7.2. Dynamic Feature Extensions Schema Registration URI: urn:ietf:params:xml:ns:pidf:geopriv10:dynamic10 Registrant Contact: IETF Geopriv Working Group, Hannes Tschofenig (hannes.tschofenig@nsn.com). XML: The XML schema to be registered is contained in Section 4. Its first line is and its last line is Schulzrinne, et al. Expires September 10, 2009 [Page 7] Internet-Draft Dynamic Feature Extensions to PIDF-LO March 2009 7.3. Units of Measure Registration Placeholder for - urn:ietf:params:ns:geopriv:dynamic:uom#mps - urn:ietf:params:ns:geopriv:dynamic:uom#mps2 8. Acknowledgements We would like to thank Klaus Darilion, Cullen Jennings, Rohan Mahy, Carl Reed, and Brian Rosen for their comments. 9. References 9.1. Normative References [GML] "Geographic information - Geography Markup Language (GML), OpenGIS 03-105r1, available at: http://portal.opengeospatial.org/files/?artifact_id=4700", April 2004. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", RFC 2119, BCP 14, March 1997. [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, January 2004. [RFC4119] Peterson, J., "A Presence-based GEOPRIV Location Object Format", RFC 4119, December 2005. [RFC4481] Schulzrinne, H., "Timed Presence Extensions to the Presence Information Data Format (PIDF) to Indicate Status Information for Past and Future Time Intervals", RFC 4481, July 2006. 9.2. Informative References [GeoShape] Thomson, M. and C. Reed, "GML 3.1.1 PIDF-LO Shape Application Schema for use by the Internet Engineering Task Force (IETF)", Candidate OpenGIS Implementation Specification 06-142, Version: 0.0.9, December 2006. [I-D.ietf-geopriv-pdif-lo-profile] Winterbottom, J., Thomson, M., and H. Tschofenig, "GEOPRIV PIDF-LO Usage Clarification, Considerations and Recommendations", draft-ietf-geopriv-pdif-lo-profile-14 (work in progress), November 2008. Schulzrinne, et al. Expires September 10, 2009 [Page 8] Internet-Draft Dynamic Feature Extensions to PIDF-LO March 2009 Authors' Addresses Henning Schulzrinne Columbia University Department of Computer Science 450 Computer Science Building, New York, NY 10027 US Phone: +1 212 939 7004 Email: hgs@cs.columbia.edu URI: http://www.cs.columbia.edu Hannes Tschofenig Nokia Siemens Networks Linnoitustie 6 Espoo 02600 Finland Phone: +358 (50) 4871445 Email: Hannes.Tschofenig@gmx.net URI: http://www.tschofenig.priv.at Martin Thomson Andrew Corporation Wollongong NSW Australia Email: martin.thomson@andrew.com Singh Vishal Email: singh.vishal@gmail.com Schulzrinne, et al. Expires September 10, 2009 [Page 9]