W3C Interaction

WebCGM Working Group Charter

The WebCGM Working Group is extended until 30 November 2007.

This charter is written in accordance with section 6.2.6 of the W3C Process Document.


About this Charter

This defines a charter for a new Working Group to produce a Recommendation for version 2.0 of the WebCGM 1.0 Recommendation . The WebCGM Working Group will be created as a Royalty Free Working Group, and will operate in public mode.

The WebCGM Working Group will start with the existing WebCGM 2.0 submission. This document was created by the CGM Open Member Section and its WebCGM Technical Committee (of the OASIS consortium), and had reached a stage of maturity similar to W3C Last Call. Therefore, the W3C Working Group will take this document to W3C Last Call, then to Candidate Recommendation.

As described by the MOU between W3C and Oasis, concurrent with becoming a Proposed Recommendation, the work will be passed back to OASIS for its completion as OASIS Standard, simultaneously with the completion of a technically identical Recommendation within W3C.

Mission and Scope

The working group will be chartered to develop a W3C Recommendation for WebCGM 2.0, starting with WebCGM 2.0 Submission Computer Graphics Metafile, or CGM, is an ISO standard for tree-structured, binary graphics format that has been adopted especially by the technical industries (defense, aviation, transportation, etc) for technical illustration in electronic documents. WebCGM 1.0 a W3C Recommendation, is a profile of ISO CGM:1999 for the effective application of CGM in Web electronic technical documents. WebCGM 1.0 represented an important interoperability agreement amongst major users and implementors of CGM, and thereby unified diverse approaches to CGM utilization in Web document applications.

Several requirements were identified in the WebCGM 1.0 timeframe that, for reasons of getting WebCGM to awaiting constituencies expeditiously, could not be fully realized in the WebCGM 1.0 specification. Further requirements have been developed since the publication of WebCGM 1.0, and all of these are collected in the WebCGM 2.0 Requirements document.

The principal requirements to be met by WebCGM 2.0 are:

The completion of work on WebCGM 2.0 will bring further standardization and enable greater interoperability in the technical graphics application sectors that have standardized on WebCGM and closely related technical profiles. In particular, several major product vendors in the area of CGM technical graphics have added proprietary APIs and companion file formats. A standard WebCGM DOM and an extensible XCF should provide greater interoperability and vendor independence for WebCGM 2.0 users.

Present state of the WebCGM 2.0 work:


This group will terminate on 31 May 2007.


The group will:

Technical Items

Tracking and Maintenance Items

Success criteria

Relationship to other forums

Groups within W3C:

Hypertext Coordination Group
The WebCGM WG coordinates its work with other Working Groups primarily through participation in the Hypertext Coordination Group.
Document Object Model (DOM) IG
WebCGM 2.0 adds an XML Document Object Model. Feedback from the DOM IG will be welcome.
W3C Web Accessibility Initiative
Feedback from the WAI project will be sought, to ensure that WebCGM 2.0 meets industry and legal requirements for accessibility.
Internationalization Working Group
Feedback from the I18N WG be sought, to ensure that WebCGM 2.0 is suitable for use in an increasingly international technical industry.
Web API Working Group
Feedback from the Web API WG be sought, to ensure that WebCGM 2.0 Document Object Model (DOM), meets W3C's Web application framework for standard APIs.
QA Interest Group
The QA Interest Group will be consulted as needed, about questions of specification and test suite quality.

Forums outside W3C:

Air Transport Association(ATA)
The ATA has a widely used profile of CGM, which was used as the basis for WebCGM 1.0. The additional capabilities of WebCGM 1.0 and 2.0 mean that the ATA could adopt WebCGM to replace its existing profile. Adoption of WebCGM 2.0, both by itself and as a cascading profile, is therefore desirable.
The Working Group will liaise with the Technical Publication Specification Maintenance Group (TPSMG) of ASD, who maintain the S1000D Standard for technical documentation of military and non military vehicles. .Adoption of WebCGM 2.0, both by itself and as a cascading profile, by ASD is desirable.
The working group will liaise with ISO/IEC JTC1 SC24, the part of ISO dealing with CGM.


The proceedings of this group will be public.

Editorial Drafts and test suite will be public.


The group anticipates at least one face-to-face meeting, to process the feedback of Last Call review, resolve comments, and begin the process of preparing the CR implementation report and advancing to PR. The need for any additional meeting(s) will be assessed, depending on the progress towards Recommendation. Meeting details will be made available on the W3C Member Calendar and from the WG page

Communication Mechanisms


A archived publicly readable mailing list public-webcgm@w3.org will be the primary means of discussion within the group.

Minutes of teleconferences and face-to-face meetings will be made publicly available in a timely manner.

There is a public page on WebCGM, maintained by the Chair.


Weekly 90-minute phone conferences will be held. Minutes will be taken in rotation by WG participants and mailed to the WG list within 24 hours.


Working Group participants are expected to contribute 20% of a Full-Time workload. The W3C Team will contribute 10% of a Full-Time workload.

The Chair of the group will be Lofton Henderson (Oasis/CGM Open). The Team Contact will be Thierry Michel (W3C).


One or more public Working Drafts will be produced, existence of adequate associated Test Suites will be assured (likely externally, with some WG contribution), and Implementation Reports will be produced, to the schedule shown below:

Patent Policy

This Working Group will operate 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.

Chris Lilley<chris@w3.org>
Lofton Henderson <lofton@rockynet.com>
Last modified: $Date: 2007/06/07 05:55:29 $