This slides covers all aspects of current Web services and discusses the future direction of Web services. It explains how to discover, describe, and access Web services and the technologies behind those functions. It also provides concrete use cases for deploying Web services and answers the question “Why use Web services?” Lastly, it provides detailed description of advanced Web service applications to include orchestration and security. The chapter closes with a discussion of grid-enabled Web services and semantic-enabled Web services.

1. Mirghani Ahmed Sudan university-web technology 2011 Part (1) Semantic Web Services mirgani2008@yahoo.com - Sudan- 0917598234

2. Outlines 6/26/2011 2 What are web services? Why we use web services? The basics of web services Securing web services. What’s next for web services? Semantic Web Services

3. Definition 6/26/2011 3 Web services are software applications that can be discovered, described, and accessedbased on XML and standard Web protocols over intranets, extranets , and the Internet. Semantic Web Services

4. Scenario of Web Services In Use 6/26/2011 4 Semantic Web Services

5. Why We Use Web Services? 6/26/2011 5 These questions are so fundamental that you should ask them about any candidate Technology: Do Web services solve real problems? Is there really a future for Web services? How can I use Web services? Semantic Web Services

6. Basics of Web Services 6/26/2011 6 This section gives a high-level overview of some of the basic Web services technologies: SOAP WSDL Semantic Web Services

8. A description of how data is encoded

9. A SOAP body that contains the application-specific message that the backend application will understand.Semantic Web Services

10. Structure of a Web-based SOAPmessage 6/26/2011 8 Semantic Web Services

11. What Is WSDL? 6/26/2011 9 Stand of Web Service Definition Language. The W3C defines WSDL as “an XML format for describing network services as a set of endpoints operating on messages containing either document-oriented or procedure oriented information.” Semantic Web Services

12. WSDL process works 6/26/2011 10 Dynamic communication by inspecting WSDL. Semantic Web Services

14. ebXML registries.Semantic Web Services

15. What Is UDDI? 6/26/2011 12 Universal Description, Discovery, and Integration is an evolving technology and is not yet a standard, but it is being implemented and embraced by major vendors. UDDI is a phone book for Web services. allows you to discover Web services. Semantic Web Services

16. UDDI Registry 6/26/2011 13 A UDDI Registry as a conceptual phone book Semantic Web Services

17. What Are ebXML Registries? 6/26/2011 14 The ebXML standard was created by OASIS to link traditional data exchanges to business applications to enable intelligent business processes using XML. Semantic Web Services

18. An ebXMLArchitecture 6/26/2011 15 An ebXML architecture in use. Semantic Web Services

20. An Orchestration 6/26/2011 17 An orchestration example. Semantic Web Services

22. Authorization.

23. Single sign-on (SSO).

24. Confidentiality.

25. Integrity.

26. Non repudiation.Semantic Web Services

27. Protection scenario 6/26/2011 19 Protection at every point Semantic Web Services

28. Other Security Types 6/26/2011 20 XML Signature XML Signature is a W3C Recommendation that provides a means to validate message integrity and non-repudiation. With XML Signature, any part of an XML document can be digitally signed. Semantic Web Services

29. 6/26/2011 21 XML Encryption XML Encryption is a technology and W3C Candidate Recommendation that handles confidentiality; it can hide sensitive content, so that only the intended recipient can read the sensitive information. Semantic Web Services

30. What’s Next for Web Services? 6/26/2011 22 As Web services evolve, there is great potential in two major areas: Grid-Enabled Web Services: Grid computing is a technology concept that can achieve flexible, secure, and coordinated resource sharing among dynamic collections of individuals, institutions , and resources. Semantic Web Services

31. 6/26/2011 23 A Semantic Web of Web Services: The Semantic Web and Web services go hand in hand. XML, a self-describing language, is not enough. WSDL, a language that describes the SOAP interfaces to Web services, is not enough. Automated support is needed in dealing with numerous specialized data formats. Semantic Web Services

32. Summary 6/26/2011 24 Defining web services. Basic technologies of web services. Orchestration. Security in web services. A vision of where we believe web services will be tomorrow. Semantic Web Services

33. References 6/26/2011 25 The Semantic Web:A Guide to the Future of XML, Web Services, and Knowledge Management. Dieter Fensel , “Semantic Enabled Web Services,” XML-Web Services ONE Conference, June 7,2002. Foster, Kesselman , Tuecke , “The Anatomy of the Grid: Enabling Scalable Virtual Organizations,” International J. Supercomputer Applications 15, no.3, (2001). Kevin T. Smith, “Solutions for Web Services Security. Bruce Schneier, “Cryptogram Monthly Newsletter,” February 15, 2002, http://www.counterpane.com Semantic Web Services