From: Mustafa Akgul (akgul@Bilkent.EDU.TR)
Date: Fri 12 Jul 2002 - 05:27:22 EEST
Date: Thu, 11 Jul 2002 19:14:00 -0700 (PDT)
From: HPCwire <hpcwire@tgc.com>
Message-Id: <200207120214.TAA82323@newsmaster.tgc.com>
To: akgul@Bilkent.EDU.TR
Subject: 103074 W3C PRODUCES IMPROVED OPEN WEB SERVICES VOCABULARY 07.12.02
X-Virus-Scanned: by AMaViS snapshot-20010714
W3C PRODUCES IMPROVED OPEN WEB SERVICES VOCABULARY 07.12.02
SCIENCE AND ENGINEERING NEWS HPCwire
==============================================================================
The World Wide Web Consortium (W3C) has issued Web Services Description
Language (WSDL) 1.2 and WSDL 1.2 Bindings as W3C Public Working Drafts. WSDL
1.2 is an XML-based language that describes a Web Service - the data
exchanged, the protocol to use, and its location on the Web. WSDL 1.2 Bindings
describes how to use WSDL 1.2 with SOAP 1.2, HTTP, and MIME. These are the
first in the series of WSDL 1.2 drafts; W3C invites the Web development
community to review and comment on these and subsequent versions.
W3C's Web Services Activity Works on Architecture and Components, Including
WSDL 1.2
W3C has been at work developing an architecture for Web Services which takes
into account the needs of users as well as technology vendors, pursuing the
development of open standardized components for Web Services, as it has done
for HTML, the XML family of technologies, Scalable Vector Graphics, and Voice-
Web technologies. "'Web Services' begin with the Web," remarked W3C Web
Services Activity Lead, Hugo Haas. "W3C's success depends on the commitment to
Web architectural principles of extensibility, openness and interoperability."
The W3C Web Services Activity currently consists of three Royalty-Free Working
Groups whose focus is to develop an open, interoperable and extensible model
for Web Services (Web Services Architecture Working Group), as well as
critical components, such as an XML-based protocol for data to be exchanged
and processed by applications (XML Protocol Working Group, developing SOAP
1.2), and technologies for providing descriptions of Web Services (Web
Services Description Working Group). Each W3C Web Services Working Group is
chartered to conduct its technical work in public, with discussion lists,
meeting reports, and drafts of work in progress.
WSDL 1.2 Provides Improved Interoperability, Better Component Definition
Many developers and IT managers learned about WSDL as a specification created
by individual companies. After WSDL 1.1 was published as an informational
document at W3C, companies and developers expressed interest in W3C pursuing
the development of a Web services description language that could be based on
WSDL 1.1, but would be subject to the W3C Process and technical requirements,
such as support for W3C Recommendations, and coordination with other W3C
technical Activities. Others were interested in seeing Web Services components
developed with a mandate for Royalty-Free technologies.
As a result, the W3C Web Services Description Working Group was chartered to
make an open, stable Web Services Description Language, based in part on
Requirements and Usage Scenarios set by the full group. Today's publication
includes better component definition, which was the result of having open
participation in the framing of requirements and review of WSDL 1.1, and the
Working Group requirements for an unencumbered specification.
WSDL 1.2 provides improvements over WSDL 1.1 in distinct ways.
* WSDL 1.2 includes language clarifications, which makes it easier for
developers to understand and use.
* WSDL 1.2 provides support for W3C Recommendations, including XML Schemas
and XML Information Set.
* WSDL 1.2 adopts a conceptual framework approach to define the description
components, which makes them simpler and more flexible.
* WSDL 1.2 removes unnecessary and non-interoperable features from WSDL 1.1.
* WSDL 1.2 provides a better definition for the HTTP 1.1 binding and will
soon provide a binding for SOAP 1.2, which allows description of services
using the most current version of SOAP.
Upcoming Plans Include Mapping to Semantic Web Foundations, Outside
Coordination
The W3C Web Services Description Working Group, as one of over thirty W3C
Working Groups, must ensure that their work results in a specification that
interoperates cleanly with existing W3C work, including that of both the XML
and Semantic Web Activities. For the XML Activity, the Web Services
Description Working Group continues to track the evolution of the XML Family
of specifications. For the Semantic Web Activity, the Working Group is
chartered to cooperate with the Resource Description Framework (RDF) Interest
Group to produce a mapping of WSDL 1.2 to RDF, the language which provides
interoperability between applications that exchange machine-understandable
information - the foundation for the Semantic Web.
Like other W3C Web Services Working Groups, the Web Services Description
Working Group is also expected to establish coordination with outside
organizations, including the Global Grid Forum and the Object Management
Group.
Over Thirty W3C Members and Invited Experts Involved in WSDL 1.2
To ensure that a Web services description language meets the needs of diverse
users, W3C relies on the diversity of its Membership and of the wider Web
developer community. Together, they have contributed in providing a variety of
use cases and practical examples of the problems end users would like to have
solved, and in the resulting drafts.
The participants include AT&T; Canon; Cisco Systems; Citigroup; Computer
Associates; Cyclone Commerce; DaimlerChrysler Research and Technology;
L'Echangeur; Electronic Data Systems; Global Grid Forum; W.W. Grainger;
Hewlett-Packard Company; Intel Corporation; IONA Technologies; IBM; Lexmark;
Macromedia; University of Maryland; Microsoft Corporation; Nokia; Oracle
Corporation; Rogue Wave Software; SAP; Software AG; Sun Microsystems;
Systinet; TIBCO Software; Verisign; webMethods, Inc.; Xerox; as well as the
many contributors to the W3C Web Services Description public mailing list.
More progress is also expected on Usage Scenarios and Requirements.
Web site: http://www.w3.org/
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