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[Fwd: WebCGM 2.1 is a W3C Candidate Recommendation (Call for Implementations)]

From: Thierry Michel <tmichel@w3.org>
Date: Wed, 16 Sep 2009 10:15:11 +0200
Message-ID: <4AB09E8F.3070101@w3.org>
To: public-webcgm@w3.org, WebCGM WG <public-webcgm-wg@w3.org>
WebCGM 2.1 is a W3C Candidate Recommendation (Call for Implementations)

Thierry Michel

WebCGM WG Team Contact

Dear Advisory Committee Representative,

I am pleased to announce that WebCGM 2.1 is a W3C Candidate Recommendation:

The approval and publication are in response to this transition request:

The disposition of Last Call comments is available at:

There were no Formal Objections.

The WebCGM Working Group Working Group expects to receive more comments 
in the form of implementation feedback and test cases. The Working Group 
believes it will have satisfied its implementation criteria by 15 
October 2009.

The WebCGM Working Group Charter is available at

Patent disclosures relevant to this specification may be found on the 
WebCGM Working Group's patent disclosure page in conformance with W3C 

More information is available on the WebCGM Working Group home page:

This Call for Implementations follows section 7.4.3 of the W3C Process
Document: http://www.w3.org/2005/10/Process-20051014/tr#cfi

Thank you,

For Tim Berners-Lee, Director, and
Philippe Le Hégaret, Interaction Domain Lead;
Ian Jacobs, Head of W3C Communications

Quoting from the WebCGM 2.1 W3C Candidate Recommendation - 15 September 2009

Computer Graphics Metafile (CGM) is an ISO standard, defined by ISO/IEC 
8632:1999, for the interchange of 2D vector and mixed vector/raster 
graphics. WebCGM is a profile of CGM, which adds Web linking and is 
optimized for Web applications in technical illustration, electronic 
documentation, geophysical data visualization, and similar fields. First 
published (1.0) in 1999, WebCGM unifies potentially diverse approaches 
to CGM utilization in Web document applications. It therefore represents 
a significant interoperability agreement amongst major users and 
implementers of the ISO CGM standard.

The design criteria for WebCGM aim to balance graphical expressive power 
on the one hand, versus simplicity and implementability on the other. A 
small but powerful set of standardized metadata elements supports the 
functionalities of hyperlinking and document navigation, picture 
structuring and layering, and enabling search and query of WebCGM 
picture content.

The present version, WebCGM 2.1, refines and completes the features of 
the major WebCGM 2.0 release. WebCGM 2.0 added a DOM (API) specification 
for programmatic access to WebCGM objects, a specification of an XML 
Companion File (XCF) architecture, and extended the graphical and 
intelligent content of WebCGM 1.0.

Status of This Document
This section describes the status of this document at the time of its 
publication. Other documents may supersede this document. A list of 
current W3C publications and the latest revision of this technical 
report can be found in the W3C technical reports index at 

This is a W3C Candidate Recommendation of the WebCGM 2.1. W3C publishes 
a Candidate Recommendation to indicate that the document is believed to 
be stable and to encourage implementation by the developer community. 
The WebCGM Working Group expects to request that the Director advance 
this document to Proposed Recommendation when the following exit 
criteria have been met:

1. Sufficient reports of implementation experience have been gathered to 
demonstrate that the WebCGM 2.1 features are implementable and are 
interpreted in a consistent manner. To do so, the Working Group will 
insure that all features in the WebCGM 2.1 specification have been 
implemented at least twice in an interoperable way. This defined this as:
    * the implementations have been developed independently,
    * each test in the WebCGM 2.1 test suite has at least two passing 

2. The Working Group has adopted a public test suite [1] for WebCGM 2.1 
and has produced a preliminary WebCGM 2.1 implementation report.

The preliminary Interoperability Implementation Report shows that a fair 
amount of WebCGM 2.1 features are already implemented. This document 
will remain a Candidate Recommendation until at least 15 October 2009.

The Working Group has identified the following features as "at risk":

    * XCF access to the new 2.1 Style Properties (see 4.3.2, stroke-type 
through fill-offset)
    * XCF access to the new 2.1 transform functionality (see 4.3.2, 
    * ACI access to Line Type Continuation (
    * ACI access to Edge Type Continuation (
    * ACI access to Hatch Style Definition (
    * ACI access to Line and Edge Type Definition (

Features for which there are not at least two implementations at the end 
of the Candidate Recommendation period may be removed from this 

This document was developed by the WebCGM Working Group, part of the 
Graphics Activity. The Working Group expects to advance this Working 
Draft to Recommendation Status. The list of changes made since the last 
public Working Draft is available in Appendix D, "Change Log", and are 
highlighted in the text itself.

WebCGM 2.1 is related to the previous W3C work on WebCGM 1.0 and 2.0. 
WebCGM 2.0 was simultaneously published by W3C as a Recommendation and 
by OASIS as an OASIS Standard. The two versions are identical in 
technical content, differing only in the formatting and presentation 
conventions of the two organizations. It is agreed that WebCGM 2.1 will 
be progressed by the same collaborative process and will result in 
technically a identical Recommendation and OASIS Standard.

This WebCGM 2.1 specification was initially based on a work by the same 
name, WebCGM 2.1 an OASIS Committee Specification.

The W3C Membership and other interested parties are invited to review 
the document and send comments through 15 October 2009 to 
public-webcgm@w3.org mailing list (public archive), including the prefix 
'[WebCGM 2.1 CR comment]' in the subject line.

Publication as a Candidate Recommendation does not imply endorsement by 
the W3C Membership. This is a draft document and may be updated, 
replaced or obsoleted by other documents at any time. It is 
inappropriate to cite this document as other than work in progress.

This document was produced by a group operating under the 5 February 
2004 W3C Patent Policy. W3C maintains a public list of any patent 
disclosures made in connection with the deliverables of the group[2] ; 
that page also includes instructions for disclosing a patent. An 
individual who has actual knowledge of a patent which the individual 
believes contains Essential Claim(s) must disclose the information in 
accordance with section 6 of the W3C Patent Policy.

[1] http://www.w3.org/2006/Graphics/WebCGM/testsuite.html
[2] http://www.w3.org/2004/01/pp-impl/39256/status

Ian Jacobs (ij@w3.org)    http://www.w3.org/People/Jacobs/
Tel:                                      +1 718 260 9447
Received on Wednesday, 16 September 2009 08:15:34 UTC

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