Web Service and Semantic Web WS / SW Shang Rong Tsai Department of Information Management Chang-Jung University Web Service (1/2) • Purposes – An open platform for accessing services as automatically as possible – Automatically integrating services • Basic technologies – XML – SOAP – HTTP – UDDI – WSDL Web Service (2/2) • What degree of automation can we get by Web Services ? • What efforts should programmers or users pay for using or integrating the available Web services ? What WSDL can help us in this aspect ? • Can computers understand the semantic of a Web Service ? (You can try to think about this case: using all meaningless tags to encode all the XML documents, then you are the computer to read the documents) • The Web site of XMethods, Inc gave me a good starting point to think about such questions Semantic Web • Web evolutions and developments – Data • HTML => DHTML => XML – Metadata • RDF/RDFS/OWL • Can computers understand the meanings of data ? – The goal of Semantic Web – One of the keys would be how the metadata be described. – It would need experts to define for each knowledge or application domain the metadata, a set of classes about the metadata. Thus, computers would be able to understand the semantic of the data. Web Service / Semantic Web • SW and WS are Complementary • Two facets of machine-to-machine communication – service based =>Web of applications – metadata based =>Web of data • A widely deployed Web Services infrastructure may be the most compelling business case for the Semantic Web • The synergy of Semantic Web and Web Service will hugely benefit for the wide deployment of both! Some Questions • Where to start ? • What is the current status ? • What are the killer applications ? • What we can expect in final ? • Who (companies) already involved ? • My comments – People just expect good contents and services. – Semantic Web and Web service can give some advantages in providing good contents and services in a large scale (on the whole Web), where automation by computers should be mandatory. – Then, people can just enjoy life, but not suffer by computers.
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