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FYI: WS Constraints and Capabilities workshop

From: Philippe Le Hegaret <plh@w3.org>
Date: Wed, 15 Oct 2003 15:48:52 -0400
To: www-ws-cg@w3.org
Message-Id: <1066247332.24616.99.camel@jfouffa.w3.org>


This letter has been sent to the authors of the WS Policy documents. W3C
Web Services Working Groups, in particular Description and Architecture,
are of course welcome (and even expected!) to provide inputs to the
proposed workshop.


Dear WS-Policy authors,

During our recent review of the Web Services specifications issued by
industry, we had in-depth discussions about the set of WS Policy
specifications: Framework, Attachments, Assertions, and Security. The
W3C has been focusing of the core architecture of Web Services and, from
our understanding of the specifications, we firmly believe that this
area is part on the Core.

Our review brought to light several issues regarding the
specifications. We understand that these specifications are still drafts
and need further development, but the specifications must be brought
more closely into line with core Web services requirements. W3C can
contribute to improve them substantially. For example, privacy has not
been addressed (yet) by WS-Policy. We have experts in that field, and a
Working Group (P3P) dedicated to that topic, who organized workshops in
the past on the use of P3P beyond the scope of HTTP, and is working on
addressing the privacy requirement listed in the Web Services
Architecture requirement document, including the social implications. We
are very concerned that if WS Policy develops without adequate
coordination with privacy work at W3C, we will see fragmentation on this
critical policy requirement. W3C has a clear track record of success
with the P3P activity. Those interested in promoting Web Services ought
to build on that, rather than try to compete against it. We also note
that this area has some relation with our Composite
Capabilities/Preference Profile (CC/PP) activity. We would like
the work to happen within the Web Services Activity, compatible with the
extensibility model provided by WSDL and its extensions, such as

Our current plan is to organize a workshop among the members of various
interested communities (WS-Policy, WSDL, P3P, OASIS related
technologies, etc.) to brainstorm around the need to express the
capabilities of a Web service and the constraints that need to be met to
interact with it. One possible result of the workshop could be the
creation of a new Working Group in the Web Services activity. and work
on an enhanced version of the work done in the WS Policy area. If all
goes smoothly, this workshop would take place in January 2004. The host,
chairs, and program committee remain to be decided.

The market is increasingly confused by the growing number of Web
services specifications and their dissemination in various places, and
W3C is seen as a body producing quality specifications, for the good of
the Web. We believe that W3C needs to continue establishing the Core
architecture of Web Services to reassure the market. Recent developments
between companies or within other organizations will not help reassuring
consumers, and a loss of confidence will have a negative impact on the
future of Web Services. The patent policy that W3C adopted in 2003
differentiates W3C from other organizations, and contributes to W3C's
being seen as a reassuring place to develop quality technologies.

In short, we strongly believe that there is good technical work to be
done in this area, and that W3C is the right place to do it. Are you
willing to participate in a workshop on defining the constraints and
capabilities for Web Services? Are you willing to bring WS Policy to W3C
as one of the inputs for further work?

As we are aiming for a workshop in January, we would appreciate to get
your feedback no later than the end of October. We welcome proposals for
hosting and chairing of this workshop. Don't hesitate to contact us for
further discussion or clarification,

We are looking forward to hearing from you,

Hugo Haas, Web Services Activity Lead, and
Philippe Le Hégaret, Architecture Domain Leader.
Received on Wednesday, 15 October 2003 15:51:07 UTC

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