The semantic web

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Semantic web technology


<ul><li> 1. SKN SIT, LONAVALA Semantic WebG U I D E : - P R F O. P. R . B A R A PAT R E BY A B H I J I T C . M A N E PAT I LRO L L N O. - C E 1 9</li></ul> <p> 2. Contents Introduction. History. Layered approach of Semantic Web. Content of Semantic Web. Need of Semantic Web. Issues and Challenges. Conclusion. References. 3. Introduction Definition : "The Semantic Web is an extension of the current web inwhich information is given well-defined meaning, betterenabling computers and people to work in co-operation. It is the web of data that can be processed directly &amp; indirectlyby machine. It Defines the things in the way that computer application canunderstand it. Developed by Tim Berner lee. 4. Conti Web has millions of documents with each one has set of terms. Terms are used to search the documents. E.g. Book written by jone. Semantic web allows to search exact result. 5. History Web 1.0 Read Only era Static Pages. e.g.. Wikipedia Web 2.0 Dynamic Pages Active Interaction e.g. Facebook, You Tube. Web 3.0 Next Evolution 6. Web 3.0 Semantic Web Machine Understandable Intelligence web More Active Interaction Defines the specific syntax for web 1) common format for integration &amp; combination of data 2) It is also about the language for recording that how the data relates to real world objects. 7. Layered Approach of Semantic Web 8. Components of the Semantic Web XML Uniform Resource Identifier (URI) Resource Description Framework (RDF) Resource Description Framework Schema (RDFS) Web Ontology Language (OWL) 9. XML HTML and XML XML with structured information XML shows the relationship betn terms of documents Which is machine understandable every peace of info. Is described. 10. Uniform Resource Identifier (URI) Web identifier : like string starting with http or ftp Anyone can create a URI Every resource has URI or a web address URI defines the web location Anything that has a URI is On the Web 11. Resource Description Framework (RDF) Family of W3C designed as metadata model. General Methods for conceptual description ormodeling of information.(Syntax) Similar to the ER or Class diagrams Shows the relationship between Subject-Predicates-Object (triples) E.g. The Sky has the color blue RDF abstract model with serialization format (ie fileformat) 12. RDF Schema Extensible knowledge representation language. RangeinvolesDomain CountryCitizenStates subclasssubclass VotingNonVotingCityTaluka CitizenTownCitizen RDFS type RDFStays inAbhijit Pune(Predicate)SubjectObject 13. Web with RDF 14. OWL (Web Ontology Language ) An ontology is an explict and formal specification ofa conceptualization. It consist of finite list of terms and relationship betnthem. Shared understanding Orgnizing and mapping wesite Improves the accuracy of web search 15. Issues and Challenges Its Too ComplexThe RDF model is felt to be complex The RDF representation in XML looks complex Industry Isnt Interested The Semantic Web wont take off unless the IT sector developstools Its Too Researchy The Semantic Web is an idea for the AI research communityand not for mainstream use Consensus Not Yet Reached On ArchitecturalApproach There is still debate on RDF, patent issues, etc. 16. Scope 17. Conclusion To conclude: The first version of the Web lacked a metadata framework which wasneeded to describe resources W3C developed RDF to provide this framework Semantic web is the Future of Internet which will expected torewrite the internet as we know Change the way of information search on web Semantic web can overcome all the traditional problems to provide abetter and rich user experience to consumers all over the world. 18. References IEEE Internet Computing The Semantic Web: The Roles of XMLand RDF Stefan Decker And Sergey Melnik Stanford University. IEEE INTELLIGENT SYSTEMS Ontology Languages for theSemantic Web Asuncin Gmez-Prez and Oscar Corcho,Universidad Politcnica de Madrid. IEEE Published by the IEEE Computer Society:Semantics Scales Up Beyond Search in Web 3.0 T. Berners-Lee. Semantic Web Road Map </p>