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XML : XML Web Services

XML Web Services, including the use of SOAP, WSDL and UDDI
Subsections:
>XML Web Services - SOAP
 - Simple Object Access Protocol (SOAP) is an XML-based communications protocol, and is at the heart of all XML Web Services technology.
>XML Web Services - WSDL
 - Web Services Description Language (WSDL) is an XML-based format for describing web service interfaces, and is at the heart of all XML Web Services
>XML Web Services - UDDI
 - Universal Description, Discovery and Integration (UDDI) is the naming service standard for XML Web services. UDDI provides both "white pages" searching by name, as well as "yellow pages" searching by classification or categorization information. It also includes the necessary "green pages" information which defines the technical information for communication with a particular web service instance.


See Also:
^XML Applications and Uses
>RDF - Resource Description Format
>XML Web Services - SOAP
>XML Web Services - WSDL
>XML Web Services - UDDI


* The Rise of Web Services
A technical introduction to Web Services explaining how XML, SOAP and, more recently, UDDI and WSDL are making the hosting and offering of web services possible.
* Understanding Web Services
This article describes the Service Web, outlines the key standards of SOAP, WSDL, and UDDI, and discusses new tools for developing Web Services. Armed with this information, you should be able to understand how Web Services can enhance your business and how you can begin developing them.
* Book: Programming Web Services with SOAP
The web services architecture provides a new way to think about and implement application-to-application integration and interoperability that makes the development platform irrelevant. Two applications, regardless of operating system, programming language, or any other technical implementation detail, communicate using XML messages over open Internet protocols such as HTTP or SMTP. The Simple Open Access Protocol (SOAP) is a specification that details how to encode that information and has become the messaging protocol of choice for Web services. Programming Web Services with SOAP is a detailed guide to using SOAP and other leading web services standards--WSDL (Web Service Description Language), and UDDI (Universal Description, Discovery, and Integration protocol). You'll learn the concepts of the web services architecture and get practical advice on building and deploying web services in the enterprise. This authoritative book decodes the standards, explaining the concepts and implementation in a clear, concise style. You'll also learn about the major toolkits for building and deploying web services. Examples in Java, Perl, C SHARP, and Visual Basic illustrate the principles. Significant applications developed using Java and Perl on the Apache Tomcat web platform address real issues such as security, debugging, and interoperability. Covered topic areas include: The Web Services Architecture SOAP envelopes, headers, and encodings WSDL and UDDI Writing web services with Apache SOAP and Java Writing web services with Perl's SOAP::Lite Peer-to-peer (P2P) web services Enterprise issues such as authentication, security, and identity Up-and-coming standards projects for web services Programming Web Services with SOAP provides you with all the information on the standards, protocols, and toolkits you'll need to integrate information services with SOAP. You'll find a solid core of information that will help you develop individual Web services or discover new ways to integrate core business processes across an enterprise.
Buy it TODAY from Amazon Worldwide/U.S.A. or U.K.
* WS-I - Web Services Interoperability Organization
WS-I is an open, industry organization chartered to promote Web services interoperability across platforms, operating systems, and programming languages. The organization works across the industry and standards organizations to respond to customer needs by providing guidance, best practices, and resources for developing Web services solutions.
* Simple Web Services API
Various leaders from the Open Source world have collaborated to develop an API that is simple enough to be used by even beginning users and yet sophisticated enough to handle even complex web services. In order to stress the importance of simplicity, the name of the API is Simple Web Services API (SWSAPI).
* What Charging mechanism should we use for Web Services?
This article discusses how services published today are basically free and therefore not measured in terms of their value, but soon services will be published of higher value, and a need for a model to efficiently measure Web services invoked by service requesters of revenue models will be required.
* Metering and accounting for Web services
In this article, the authors describe a generalized pricing model for commercial Web services that can be implemented by service providers for service requesters. The solution they propose shows how the use of Web services can be metered, and the resulting data used for subsequent accounting and billing processes. By way of example, the solution presented in the article is itself implemented as a Web service.
* Web Services and Remote References
What are "remote references", and how do they relate to distributed object technology? Are the concepts of a remote object reference still applicable for Web Services technology? This article describes briefly the software architecture concept of remote references, and shows why they are best avoided when using XML Web Services due to the fundamental mismatch between the service oriented middleware approach of Web Services and the object oriented middleware required to support a remote reference architecture.
* Follow up: Web Services and Remote References
Follow up comments on TheServerSide.com about the article "Web Services and Remote References".
* Book: Architecting Web Services
This book provides a good, detailed introduction to Web Services from an Architect's point of view. It allows you to identify where these technologies could be applied, and how to apply them. The treatment is toolkit-independent, and provides a concise approach to web services architecture with many examples illustrating the approach.
Buy it TODAY from Amazon Worldwide/U.S.A. or U.K.
* Transactions over Web Services - An Introduction to the Business Transaction Protocol
A useful article on webservices.org from Muhammad F. Kaleem describing the concepts behind long running business transaction using web services technology, and an overview of how the forthcoming Business Transaction Protocol (BTP) specification is addressing this area.
* Book: Web Services Business Strategies and Architectures
Adopting Web Services will affect many processes within any organization. To throw light on the most important issues, we have commissioned Experts in the Industry to share their insights. The resultant papers cover a broad spectrum from architecture to business strategies without diverting into deep technological fashions. Each study in the collection will answer specific business challenges thrown up by Web Service architectures. Before changing, commissioning, or evaluating a Web Service initiative, all IT Managers, System Architects, Lead Developers, and Business Visionaries should study and reference this book.
Buy it TODAY from Amazon Worldwide/U.S.A. or U.K.
* First look at the WS-I Basic Profile 1.0
In this article, Chris Ferris, IBM's lead representative on the Basic Profile WG in WS-I, provides an overview of the Web Services Interoperability Organization's initial version of the Basic Profile 1.0 document. He assessed the relevance of the document to web services developers everywhere, and provides some worked examples of the main areas of impact. This is a much easier introduction to the topic than reading the whole profile document itself, and provides an ideal way to get started understanding the functions of the WS-I, and the Basic Profile itself.



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