Abstract from the WebCGM 1.0 Second Release: "CGM (Computer Graphics Metafile) has been an ISO standard for vector and composite vector/raster picture definition since 1987. It has been a registered MIME type since 1995. CGM has a significant following in technical illustration, electronic documentation, geophysical data visualization, amongst other application areas. WebCGM is a profile for the effective application of CGM in Web electronic documents. WebCGM has been a joint effort of the CGM Open Consortium, in collaboration with W3C staff and supported by the European Commission Esprit project. It represents an important interoperability agreement amongst major users and implementors of CGM, and thereby unifies current diverse approaches to CGM utilization in Web document applications. WebCGM's clear and unambiguous conformance requirements will enhance interoperability of implementations, and it should be possible to leverage existing CGM validation tools, test suites, and the product certification testing services for application to WebCGM. While WebCGM is a binary file format and is not 'stylable', nevertheless WebCGM follows published W3C requirements for a scalable graphics format where such are applicable. The design criteria for the graphical content of WebCGM aimed at a balance between graphical expressive power on the one hand, and simplicity and implementability on the other. A small but powerful set of metadata elements is standardized in WebCGM, to support the functionalities of: hyperlinking and document navigation; picture structuring and layering; and, search and query on WebCGM picture content."
Bibliographic information: WebCGM 1.0 Second Release. W3C Recommendation, 17-December-2001. Version URL: http://www.w3.org/TR/2001/REC-WebCGM-20011217. Also as a .ZIP archive. Latest Version URL: http://www.w3.org/TR/REC-WebCGM. Previous Version URL: http://www.w3.org/TR/1999/REC-WebCGM-19990121. By David Cruikshank (The Boeing Company), John Gebhardt (Intercap Graphics Systems), Lofton Henderson (Inso Corporation), Roy Platon (CCLRC), and Dieter Weidenbrueck (ITEDO/IsoDraw).
Abstract from the "Vendor Offering" demo at XML 2001, entitled 'New Vendor Products for REC WebCGM Interoperability': "WebCGM is a stable and mature W3C Recommendation for technical graphics on the Web. Besides having functionality accurately targeted at its functional niche, a standard needs several other things to succeed. The most obvious need is a critical mass of implementations which interoperate successfully. Five vendors of the CGM Open Consortium are now releasing WebCGM products, whose functionality spans the categories of WebCGM content generators, format transcoders, viewers and browser plugins, editors, and validators. These products are being built with the aid of a new WebCGM Conformance Test Suite, which adds the critical component of verifiability. After a brief introduction and pointer to additional WebCGM resources and information, we will present three brief sub-scenarios that simulate snippets of workflow, in which the five vendors will (pair-wise) apply their products and functionality, to demonstrate the interoperable potential of WebCGM and the products."
[January 21, 1999]. A W3C press release announces that "The World Wide Web Consortium Issues WebCGM Profile as a W3C Recommendation. Interoperability for Industrial-strength CGM Graphics." References: REC-WebCGM-19990121, W3C Recommendation, 21 January 1999. The authors include David Cruikshank (The Boeing Company), John Gebhardt (Intercap Graphics Systems), Lofton Henderson (Inso Corporation), Roy Platon (CCLRC), and Dieter Weidenbrück (ITEDO/IsoDraw). As part of the W3C Graphics Activity, the WebCGM Profile 'reflects cross-industry agreement on an interoperable way to exchange dynamic, hyperlinked Computer Graphics Metafile (CGM) files over the Web.' "Key industry players - members of CGM Open, W3C, or both - brought their expertise to the design of this profile: ArborText, Auto-trol Technologies, Aerospatiale, Bentley Systems, The Boeing Company, CCLRC, Inso Corporation, Intercap Graphics Systems, ITEDO/IsoDraw, Jeppesen Inc, Larson Software Technology, NIST, System Development Inc, Xerox Corporation, and Zeh Graphic Systems. The work was also supported by the European Commission's Esprit Project and undertaken in liaison with ISO/IEC JTC 1/SC24, the ISO working group which developed the CGM specification. The Recommendation provides a "formal specification of the content model of the CGM Version 4 functionality of WebCGM - the 'Intelligence' content. XML has been chosen as the specification language for the content model of the CGM, as validating parsers are widely available which could be adapted to perform content validation checking against WebCGM instances (either via modification of the readers, or via transformation of the intelligent content of WebCGM instance)." The WebCGM Profile also "allows hyperlinks within multiple pictures in a document, links to close-up views of parts of a picture, and links from CGM to an HTML document, including a frame in a frameset. Links can have multiple destinations - for example, the wing of an aircraft could link to structural diagrams, wiring schematics, test results and parts lists; [its hyperlinking] follows the W3C Xlink design principles and is conformant with the RFC 1738 and RFC 1808 specifications used for all URLs (Web addresses)." For other information, see the testimonials.
- WebCGM Profile
- CGM Open Consortium
- WebCGM 1.0 Second Release
- Detailed TOC
- WebCGM Content Model DTD [CGM Version 4]
- WebCGM Profile. W3C Recommendation. 21-January-1999.
- W3C Graphics Activity
- Errata against WebCGM 1.0 first release (1999)
- Errata against WebCGM 1.0 Second Release
- Announcement 1999-01-21: "The World Wide Web Consortium Issues WebCGM Profile as a W3C Recommendation. Interoperability for Industrial-strength CGM Graphics."
- WebCGM tools:
- Readings on WebCGM
- "WebCGM and SVG: A Comparison." By Chris Lilley and Dieter Weidenbrück. Paper prepared for XML Europe 2001. 8 pages.
- WebCGM FAQ document
- Computer Graphics Metafile (CGM). ISO 8632:1992.