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W3C Workshop
on
Constraints and Capabilities for Web Services

Summary, Program, and Position Papers

October 12-13, 2004
Oracle Conference Center, Redwood Shores, CA, USA

Contents

Note: the materials (slides and position papers) are also available as a zip file. The minutes of the meeting are also available to W3C Members.

Report

On October 12th and 13th, the W3C held a Workshop on Constraints and Capabilities for Web Services. Over 50 participants had a wide-ranging discussion, but generally agreed upon addressing a restricted set of today's issues in Web services (e.g., security, management, internationalisation) while allowing extensibility for the future. Of particular interest was the exact level of functionality ― from conjunction and disjunction, negation, through to arithmetic and relational operators ― provided by such a framework. Many existing solutions, such as WS-Policy, address conjunction and disjunction, leaving more advanced functionality to future extensions. Others, such as Rei, address more. Participants agreed that an immediate solution is preferable, but were more diverse in their opinions regarding the functionality needed in such a first cut. However, there was general agreement that basing work on an existing solution, rather than starting fresh, is more likely to produce successful results.

Most participants agreed with the following recommendations:

There was less agreement between participants on the following points:

The W3C will take these recommendations into account when considering future work in this area.

Program: Tuesday, October 12

08:00am - 08:30am
Breakfast / registration
08:30am - 09:00am
Introduction to the workshop: Overview and Objectives
slides
09:00am - 09:30am
Publishing Web Service Policies, British Telecommunications.
Presented by Paul Downey
slides
09:30am - 10:00am
W3C Workshop on Constraints and Capabilities for Web Services, Jan Alexander (Systinet), Toufic Boubez (Layer 7 Technologies), Luc Clément (Systinet).
Presented by Toufic Boubez and Luc Clément
slides
10:00am - 10:30am
Web Services and Internationalization, Addison P. Phillips. webMethods, Inc.
Presented by Addison P. Phillips
slides
10:30am - 11:00am
Morning Break
11:00am - 12:30pm
Discussion / Break-out: Problem Domain and Use Cases
slides
12:30pm - 01:30pm
Lunch
01:30pm - 02:15pm
WS-Policy Presentation, by the Co-Authors on WS-Policy and WS-PolicyAttachment.
Presented by David Orchard, Claus Von Riegen
slides, slides
02:15pm - 03:00pm
RDF For Web Service Policy Assertions, Eric Prud’hommeaux. World Wide Web Consortium.
Presented By Eric Prud’hommeaux
slides
03:00pm - 03:30pm
Afternoon Break
03:30pm - 04:15pm
Declarative Policies for Describing Web Service Capabilities and Constraints, Lalana Kagal, Tim Finin, and Anupam Joshi. University of Maryland Baltimore County.
Presented by Lalana Kagal
slides
04:15pm - 05:00pm
IBM Position Paper for W3C Constraints/Capabilities, Maryann Hondo. IBM.
Presented by Maryann Hondo
slides

Program: Wednesday, October 13

08:00am - 08:30am
Breakfast / registration
08:30am - 08:45am
Objectives
08:45am - 09:45am
Comparing Features / Properties and WS-Policy, Glen Daniels. Sonic Software.
Presented by Glen Daniels
slides
09:45am - 10:30am
Position Paper for W3C Constraints and Capabilities Workshop, Ashok Malhotra, Ümit Yalçınalp. Oracle Corp.
Presented by Ashok Malhotra
slides
10:30am - 11:00am
Morning Break
11:00am - 11:45am
Constraints and Capabilities for Web Services. Sun Microsystems, Inc.
Presented by Anne Anderson
slides
11:45am - 12:30pm
IONA Technologies Position Paper. IONA Technologies, PLC.
Presented by Rebecca Bergersen
slides
12:30pm - 01:30pm
Lunch
01:30pm - 03:00pm
Discussion: Candidate Technologies
slides
03:00pm - 03:30pm
Afternoon Break
03:30pm - 05:00pm
Discussion: Summary and Next Steps
slides

Position Papers

The following list of position papers have been accepted:


Mark Nottingham, Philippe Le Hégaret, Chairs
with the help of the Program Committee: Anne Anderson, David Booth, Glen Daniels, Jim Hendler, Maryann Hondo, Greg Pavlik, Claus von Riegen, Steve Ross-Talbot, Jeffrey Schlimmer.