Hypertext Coordination Group Charter

The mission of the Hypertext Coordination Group, formally part of the HTML Activity, is to coordinate the work of W3C Working Groups dealing with user-facing technologies, primarily from the Interaction and Ubiquitous Web Domains.

End date 30 November 2013
Confidentiality Proceedings are Public
Initial Chairs Chris Lilley, Deborah Dahl
Initial Team Contacts
(FTE %: 10)
Chris Lilley
Usual Meeting Schedule Teleconferences: Every two weeks
Face-to-face: Usually no ftf meetings


The purpose of this group is to identify technical areas where different working groups may overlap, encourage discussion, and to coordinate their work. This includes liaison with other organizations.

The group is also the forum where logistics and procedure issues of common interest can be discussed and coordinated. Such issues include:

When appropriate, the Coordination Group may appoint a task force to address a technical issue that impacts several groups. Members of such tasks forces are proposed by the relevant groups and confirmed by the HCG chairs.


The Hypertext Coordination Group may from time to time publish Coordination group Notes on topics where it is helpful to document consensus of some area touching several of the coordinated groups.


W3C Groups

The initial set of coordinated groups is listed here; any changes to this list will be documented on the Hypertext Coordination Group home page. Most groups work in Public, a few are W3C Member confidential.


Cascading Style Sheets (CSS) Working Group
The CSS Working Group has produced CSS2.1, and is now developing a modular CSS3.
Device APIs and Policy Working Group
DAP creates client-side APIs that enable the development of Web Applications and Web Widgets that interact with devices services such as Calendar, Contacts, Camera, etc.
Forms Working Group
The Forms Working Group is chartered to develop the XForms specification. The key idea is to separate the user interface and presentation from the data model and logic, allowing the same form to be used on a wide variety of devices such as voice browsers, handhelds, desktops and even paper; while also being backwards compatible with classic HTML forms.
Geolocation Working Group
The Geolocation Working Group defines a secure and privacy-sensitive interface for using client-side location information in location-aware Web applications.
HTML Working Group
This working group develops and maintains the HTML specification.
Internationalization (I18N) Core Working Group
The goal of the I18N Core WG is to propose and coordinate any techniques, conventions, guidelines and activities within W3C that can help to make and keep the Web international. A large part of the I18N WG work consists in reviewing specifications developed by other groups.
Media Annotations Working Group
The Media Annotations Working Group provides an ontology and API to facilitate cross-community data integration of information related to media objects in the Web, such as video, audio and images.
Media Fragments Working Group
The Media Fragments Working Group addresses temporal and spatial media fragments in the Web using Uniform Resource Identifiers (URI).
Scalable Vector Graphics (SVG) Working Group
The working group is chartered to produce a specification for an SVG format, written as a modular XML tagset and usable as an XML namespace, which can be widely implemented in browsers and authoring tools and which is suitable for widespread adoption by the content authoring community as a replacement for many current uses of raster graphics.
Synchronized Multimedia (SYMM) Working Group
The SYMM Working Group is chartered to continue W3C's work on synchronized multimedia that started with SMIL 1.0. The language and the model should be reusable as a component in other XML-based languages and documents that require timing.
Timed Text Working Group
The Timed Text WG (TTWG) is primarily working on an XML Vocabulary for subtitling, captioning, and other applications where it is necessary to present primarily textual information with explicit timed presentation. The Distribution Format Exchange Profile (DFXP) is a format that may be used as a native distribution format. Furthermore, it is explicitly designed to be able to translate (transcode) into a number of existing distribution formats.
Web Applications Working Group (WebApps)
The mission of the Web Applications (WebApps) Working Group is to provide specifications that enable improved client-side application development on the Web, including specifications both for application programming interfaces (APIs) for client-side development and for markup vocabularies for describing and controlling client-side application behavior.
Web Events Working Group
The W3C Web Events Working Group is chartered to develop specifications for physical multitouch interface events (including such related interface as pen-tablets, electronic whiteboards, and similar input devices), as well as for higher-level events which encapsulate touch interfaces, keyboard input, mouse control, and other input devices, into a single simple, consistent model that defines user actions (such as zoom-in, scroll, redo, undo, and so forth).
WebFonts Working Group
The WebFonts Working Group develops specifications that allow the interoperable deployment of downloadable fonts on the Web.


Math Working Group
Following the MathML 2.0 Recommendation, the Math Working Group continues the task of facilitating the use of mathematical formalism on the Web, both for scientific documentation and for education.
Multimodal Interaction Working Group
The Multimodal Interaction working group is tasked with the development of a suite of specifications that together cover all necessary aspects of multimodal interaction with the Web. This work builds on top of W3C's existing specifications.
Protocols and Formats Working Group
The PFWG looks at the formal Web technologies (protocols, formats, etc.) from an accessibility perspective. Best practices for using these technologies are addressed by other WAI groups, producing guidelines explaining how to use the technologies.
Voice Browser Working Group
This Working Group have the mission to prepare and review documents related to Voice Browsers, for instance, relating to dialog management, extensions to existing Web standards, speech grammar formats and authoring guidelines. It serves also as a coordination body with existing industry groups

Other coordination groups

In addition, the XML Coordination Group and the Web Accessibility Initiative (WAI) Coordination Group maintain liaison with this Coordination Group through the participation of their chairs or delegates.

External Groups

ECMA International
ECMA International, primarily regarding ECMAScript, via TC39.
The Khronos Group, regarding OpenGL, OpenGLES, WebGL.
The International Organization for Standards. In particular, SC29 (MPEG).


Hypertext CG participants are the chairs and staff contacts of the coordinated groups. The Co-Chairs of the Coordination Group are Debbie Dahl and Chris Lilley.

The list of participants is maintained on the group home page.


This group primarily conducts its work on the Public mailing list public-hypertext-cg@w3.org (archive). It also holds a teleconference every two weeks.

Information about the group (deliverables, participants, teleconferences, etc.) is available from the Hypertext Coordination 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 Co-chairs put a question and observe dissent, after due consideration of different opinions, the Co-Chairs should record a decision (possibly after a formal vote) around any objections, and move on.

This charter is written in accordance with Section 3.4, Votes of the W3C Process Document and includes no voting procedures beyond what the Process Document requires.

Patent Disclosures

W3C reminds Coordination Group participants of their obligation to comply with patent disclosure obligations as set out in Section 6 of the W3C Patent Policy. While the Coordination Group does not produce Recommendation-track documents, when Coordination Group participants review Recommendation-track specifications from Working Groups, the patent disclosure obligations do apply.

About this Charter

This charter for the Hypertext Coordination Group has been created according to section 6.3 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.

Please also see the previous charter for this group.

Chris Lilley, Debbie Dahl

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