W3C

DRAFT Geolocation Working Group Charter

The mission of the Geolocation Working Group, part of the Ubiquitous Web Applications Activity, is to define a secure and privacy-sensitive interface for using client-side location information in location-aware Web applications.

End date 31 December 2015
Confidentiality Proceedings are public
Initial Chairs To be named
Initial Team Contact Dominique Hazaël-Massieux (FTE %: TBD)
Usual Meeting Schedule Teleconferences: as needed
Face-to-face: 2-3 per year

Scope

The number of Web enabled devices that are location-aware has increased markedly as of late. These devices are very common and include mobile phones with cell triangulation or Global Positioning System (GPS) capabilities, laptops with Wi-Fi triangulation capabilities and GPS receivers. The Geolocation WG was created in response to requests from the community for W3C to develop a standardized, secure and privacy-sensitive interface so that Web applications may gain access to location information. The Geolocation WG was created in September of 2008 and has since taken the Geolocation API to Proposed Recommendation status.

The objective of this Geolocation WG charter is to continue to work on access to the user's location information via standardized interfaces. The Working Group's scope now includes the addition of geofencing capability and indoor location enhancements to the Geolocation API.

Under the Working Group's first charter, the group developed the first version of the DeviceOrientation Event API. This new charter will allow the group to bring this API to Recommendation status as well as work on additional new deliverables.

The Working Group will continue development of Recommendation Track documents that define interfaces for making location information available within the User-Agent. These interfaces should be usable regardless of the source of location information, and should be consistent across location technologies. The interface may be specified in a language independent manner, the Recommendation will include a normative ECMAScript form.

The Working Group will determine use cases the interfaces need support and use these to derive requirements. Requirements for security and privacy protection must be included. At the time of publication of Working Drafts of Recommendation Track documents, the current use cases and requirements will be included as an Appendix.

Each Recommendation-track deliverable will have a comprehensive test suite, with a set of documented, functional tests for each assertion in the specification, before it becomes a Recommendation.

The Geolocation Working Group may wish to continue working on additional aspects of location-aware Web applications in future charters.

Success Criteria

Deliverables

Recommendation Track Deliverables

The Working Group will deliver the following documents:

  • Geolocation API Level 2 as Recommendation, a Recommendation Track document that adds additional functionality to the initial API, including geofencing and indoor location enhancements.
  • Device Orientation Event Specification as Recommendation, a Recommendation Track document that specifies a means for a web application to obtain information about physical orientation of the host device.
  • Other Deliverables

    The Working Group may also develop a primer, tutorial or other educational materials relating to Geolocation and the Web.

    The Working Group will include in all interface Recommendations an appendix that describes use cases and requirements.

    The Working Group will develop a suite of tests and accompanying documentation that shall be used when determining if the implementation criteria for exiting Candidate Recommendation have been met, as mentioned above and in the W3C Process Document.

    Milestones

    Milestones
    Note: The group will document significant changes from this initial schedule on the group home page. See milestone list on the Working Group homepage.
    Specification FPWD LC CR PR Rec
    Device Orientation Events Q2 2011 Q1 2014 Q3 2014 Q1 2015 Q2 2015
    Geolocation API Level 2 (Geofencing) Q1 2014 Q2 2014 Q1 2015 Q3 2015 Q4 2015
    Geolocation API Level 2 (Indoor Location) Q2 2014 Q4 2014 Q2 2015 Q3 2015 Q4 2015

    Timeline View Summary

    The Working Group may be involved in Workshops, the details of which will be listed on the Working Groups home page as information becomes available.

    Dependencies and Liaisons

    Liaisons with W3C Groups

    The Geolocation Working Group will request document reviews from the following groups:

    Device APIs and Policy Working Group
    The DAP Working Group is responsible for other device APIs and the policies for their use. DAP should review the Geolocation API documents in order to maintain consistency between Geolocation and other device APIs.
    Web Applications Working Group
    The Web Applications Working Group is responsible for core Web APIs, and thus may provide valuable feedback on our documents. We also expect an overlap in members with this WG.
    Internationalization Core Working Group
    There are a number of internationalization issues that we expect might need review and addressing.
    Technical Architecture Group
    The TAG and participants in the Geolocation WG have discussed the privacy aspects of the Geolocation API v1, and will likely continue to do so going forward.
    Hypertext Coordination Group
    The Geolocation Working Group will participate in the Hypertext Coordination Group.
    Web Accessibility Initiative
    The Geolocation Working Group expects to work directly with the Web Content Accessibility Guidelines (WCAG) Working Group to ensure that any accessibility implications inherent to this work have been taken into account and addressed.
    Semantic Web Interest Group
    The Semantic Web Interest Group (SWIG) developed a Basic Geo Vocabulary, which was ultimately handed over to Geospatial Incubator Group.
    Points of Interest Working Group
    The POI WG is developing points of interest data format Recommendations, which could be used to represent the location of a user (e.g. "user is at the Taj Mahal"). If POI locations are added to the Geolocation API, then the POI WG should review the documents to ensure consistency and proper use of POI.

    Liaisons with External Groups

    IETF GeoPriv Working Group
    The IETF GeoPriv Working Group is working on the format, security/privacy implications, and protocols for exchanging geographic location information.
    OMA Location Working Group
    The Open Mobile Alliance subsumed the work done in the WAP Forum and the Location Interoperability Forum. The Location WG is developing specifications that "ensure interoperability of Mobile Location Services on an end-to-end basis".
    Open Mobile Terminal Platform
    OMTP is working on recommendations for "Positioning Enablers".
    Liberty Alliance
    The Liberty Alliance is working on a standard protocol for the exchange of geolocation information.
    Open Geospatial Consortium
    The Open Geospatial Consortium (OGC) is an SDO focused on geospatial technologies, both on the Web and off. The OGC has a umber of Web related standards and specifications, including Web services for location based

    Participation

    To be successful, the Geolocation Working Group is expected to have 10 or more active participants for its duration. Effective participation to Geolocation Working Group is expected to consume one fifth of a full-time employee for each participant; two fifths of a full-time employee for editors. The Geolocation Working Group will allocate also the necessary resources for building Test Suites for each specification.

    Participants are reminded of the Good Standing requirements of the W3C Process.

    Communication

    This group primarily conducts its technical work on the public mailing list at public-geolocation@w3.org (with an archive available).

    There is also a member-only list to be used for administrative purposes at member-geolocation@w3.org (with an archive available). The member-only list may also be used, at the discretion of the Chair, for discussions in special cases when a member requests such a discussion.

    Information about the group (deliverables, participants, face-to-face meetings, teleconferences, etc.) is available from the Geolocation Working Group home page.

    Decision Policy

    As explained in the Process Document (section 3.3), this group will seek to make decisions when there is consensus. When the Chair puts a question and observes dissent, after due consideration of different opinions, the Chair should record a decision (possibly after a formal vote) and any objections, and move on.

    Patent Policy

    This Working Group operates under the W3C Patent Policy (5 February 2004 Version). To promote the widest adoption of Web standards, W3C seeks to issue Recommendations that can be implemented, according to this policy, on a Royalty-Free basis.

    For more information about disclosure obligations for this group, please see the W3C Patent Policy Implementation.

    About this Charter

    This charter for the Geolocation Working Group has been created according to section 6.2 of the Process Document. In the event of a conflict between this document or the provisions of any charter and the W3C Process, the W3C Process shall take precedence.

    This charter replaces the previous Geolocation Working Group charter.


    Dominique Hazaël-Massieux, <mdw@w3.org>, Team Contact

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