1. Chapter 6 Building Semantic Web

2. The Web
Agent
Resource Resource
Agent Resource
Agent
WEB
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Semantic Web.

3. Evolution of Web
Web Web Semantic Web Migrated Web Semantic Web
Module 1 Module 2 Module 3 Module 4 Module 5
(1995) (1998) (1999) (2000) (2001)
The Web
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Semantic Web.

4. Vision of Semantic Web
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Semantic Web.

5. Web Services
• Web services is a software system
identified by a URI, whose public
interfaces and bindings are defined and
described using XML.
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Semantic Web.

6. Infrastructure
Directory Service Security
Applications
Choreography
Web Services Service Descriptions in WSDL
SOAP
URIs XML HTTP, SMTP, other transport
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Semantic Web.

7. Web Service Scenario
UDDI Points to Description
Registry
WSDL
Describes Service
Search Service Points to Service
SOAP
Service Consumer Web Service
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Semantic Web.

8. Web Service Technologies
• SOAP for accessing Web Services
• WSDL for describing Web Services
• UDDI for publishing and looking up Web Services
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Semantic Web.

9. Combination
Semantic Web + Web Services
= Semantic Web Services
• Use Semantic Web technologies to describe Web
Services
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Semantic Web.

10. OWL-S Service
presents ServiceProfile
Resource offers Service described by ServiceModel
supports ServiceGrounding
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Semantic Web.

11. Semantic Web Services (SWS)
• The SWS architecture
– a set of components that support the usage
activities.
– Between a requester and a provider,
components such as a register, a reasoner, a
matchmaker, a decomposer and an invoker.
– The components have different names and
scopes across individual approaches.
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Semantic Web.

12. SWS Infrastructure
– Usage activities
• define functional requirements;
– the architecture
• defines the components needed for accomplishing
these activities; and
– the service ontology
• aggregates all concept models related to the
description of SWS and
• constitutes the knowledge-level model of the
information describing and supporting the usage of
the services.
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Semantic Web.

13. Main Players
– W3C
– DARPA
– EU – Funded Research & Development
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Semantic Web.

14. Proof & Trust
• Proof:
– Digital signatures plays an important role in proof.
– Security technologies like encryption and access control can be
used to ensure confidentiality of information.
• Trust:
– Everyone should be able to define a trust model for himself,
– A mechanism is necessary to derive the degree of trust for each
new source.
– WEB OF TRUST!
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Semantic Web.

15. Suggested Readings
1. Battle, S.; Bernstein, A.; Boley, H.; Grosof, B.; Gruninger, M.; Hull, R.; Kifer, M.; Martin, D.;
McGuinness, D. L.; McIlraith, S. A., Newton, G.; De Roure, D.; Skall, M.; Su, J.; Tabet, S.;
Yoshida, H. Semantic Web services framework (SWSF), W3C member submission, 2005.
2. T. Bellwood et al. UDDI Version 3.0. http://uddi.org/pubs/uddi-v3.00-published-
20020719.pdf, World Wide Web Consortium (W3C), 2002.
3. Cabral, L.; Domingue, J.; Motta, E.; Payne, T.; Hakimpour, F. Approaches to Semantic
Web services: an overview and comparison, Proceedings of the European Semantic Web
Conference, 2004.
4. S. Lu, M. Dong and F. Fotouhi. "The Semantic Web: opportunities and challenges for next-
generation Web applications." Information Research 7(4), 2002.
5. J. Ibbotson, Simple Object Access Protocol (SOAP) 1.2: Usage Scenarios.
http://www.w3.org/TR/xmlp-scenarios/, World Wide Web Consortium (W3C), HTML, 2002.
6. Feier, C.; Roman, D.; Polleres, A; Domingue, J.; Stollberg, M.; Fensel, D. Towards
intelligent Web services: Web Service Modeling Ontology (WSMO), Proceedings of the
International Conference on Intelligent Computing, 2005.
7. D. Fensel C. Bussler. The Web Service Modelling Framework WSMF. Electronic
Commerce: Research and Applications. Vol. 1. 113-137, 2002.
8. Kungas, P.; Matskin, M. Web Services roadmap: the Semantic Web perspective,
Proceedings of the International Conference on Internet and Web Applications and
Services, 2006.
9. Lara, R.; Roman, D.; Polleres, A.; Fensel, D. A conceptual comparison of WSMO and
OWL-S, Proceedings of the European Conference on Web Services, 2004.
10. W3C. "Report on Development of Web Service Discovery Framework." October 2003.
11. DERI. "Web Service Modelling Ontology Project." DERI Working Drafts, 2004.
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Semantic Web.